Parallel lines BD and EG cut by transversal AH, forming angles of 32°, 148°, and x.
Diagram showing two parallel lines BD and EG intersected by a transversal AH, with angles labeled as 32°, 148°, and x.
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Show Answer Key & Explanations
Step-by-step solution for: Corresponding Angles and Alternate Angles Worksheets and revision ...
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Show Answer Key & Explanations
Step-by-step solution for: Corresponding Angles and Alternate Angles Worksheets and revision ...
We are given a geometric figure involving two parallel lines and a transversal, with some angles labeled. Let's analyze the image step by step to solve for the unknown angle $ x $.
---
- Lines $ BD $ and $ EG $ are parallel (indicated by the arrows).
- Line $ AH $ is a transversal intersecting both parallel lines.
- At point $ F $, we have:
- One angle marked as $ 32^\circ $
- Another adjacent angle marked as $ 148^\circ $
- At point $ C $, there is an angle marked as $ x $, which is the one we need to find.
---
At point $ F $, the transversal $ AH $ crosses line $ EG $. The angles around point $ F $ on the same side of the transversal are:
- $ 32^\circ $
- $ 148^\circ $
These two angles are adjacent and form a straight line (since they lie on line $ EG $), so their sum should be $ 180^\circ $:
$$
32^\circ + 148^\circ = 180^\circ
$$
✔ This checks out — they are supplementary.
Now, notice that the $ 32^\circ $ angle and the $ 148^\circ $ angle are on opposite sides of the transversal. But more importantly, the $ 32^\circ $ angle is between the transversal and the lower line $ EG $, and the $ 148^\circ $ is the other adjacent angle.
But here’s the key: The $ 32^\circ $ angle is an alternate interior angle with respect to the upper line $ BD $.
Wait — let's clarify.
Let’s look at the configuration:
- The transversal $ AH $ intersects:
- Line $ BD $ at point $ C $
- Line $ EG $ at point $ F $
- Since $ BD \parallel EG $, we can use properties of parallel lines and transversals.
---
At point $ F $, the angle between the transversal $ AH $ and line $ EG $ is $ 32^\circ $. That is, the interior angle on the left side of the transversal is $ 32^\circ $.
This $ 32^\circ $ angle has a corresponding alternate interior angle on the other side of the transversal, between the upper line $ BD $ and the transversal $ AH $, but on the opposite side.
That alternate interior angle would be located at point $ C $, on the same side of the transversal as the $ 32^\circ $ angle?
Wait — let's think carefully.
Actually, alternate interior angles are on opposite sides of the transversal and inside the parallel lines.
So:
- The $ 32^\circ $ angle at $ F $ is interior, on the left side of the transversal.
- Its alternate interior angle would be on the right side of the transversal, inside the parallel lines, at point $ C $.
But wait — in the diagram, the angle marked $ x $ is at point $ C $, and it's on the top right side of the transversal, outside the parallel lines? Wait — no.
Let’s define the positions:
- Line $ BD $ is above, $ EG $ below.
- Transversal $ AH $ goes from top-left to bottom-right.
- At point $ C $, the angle $ x $ is above line $ BD $, on the right side of the transversal.
But that means $ x $ is not an interior angle — it's an exterior angle.
Wait — perhaps we need to consider corresponding angles or supplementary angles.
Let’s try another approach.
---
At point $ F $, we know:
- The angle between the transversal and line $ EG $ is $ 32^\circ $.
- The adjacent angle is $ 148^\circ $, which is supplementary: $ 32^\circ + 148^\circ = 180^\circ $.
Now, the $ 32^\circ $ angle is interior, and since $ BD \parallel EG $, the corresponding angle at point $ C $ should be equal.
But where is the corresponding angle?
- The $ 32^\circ $ angle is on the left side of the transversal, below line $ EG $.
- Its corresponding angle would be on the left side of the transversal, above line $ BD $.
But the angle marked $ x $ is on the right side of the transversal.
So $ x $ is not corresponding to $ 32^\circ $.
Wait — perhaps $ x $ is supplementary to the corresponding angle.
Let’s look at the angles at point $ C $.
At point $ C $, the transversal $ AH $ crosses line $ BD $. The angle $ x $ is the angle above the line $ BD $, on the right side of the transversal.
That means $ x $ is an exterior angle.
But what is the interior angle at $ C $ on the left side?
Let’s suppose that the interior angle at $ C $, on the left side of the transversal, is equal to the $ 32^\circ $ angle at $ F $, because they are alternate interior angles.
So:
> Alternate interior angles: $ \angle $ at $ F $ (32°) = $ \angle $ at $ C $ (on the left side, interior)
So, the interior angle at $ C $ on the left is $ 32^\circ $.
Then, the angle $ x $ is adjacent to this $ 32^\circ $ angle, forming a straight line along $ BD $.
So:
$$
x + 32^\circ = 180^\circ
$$
$$
x = 180^\circ - 32^\circ = 148^\circ
$$
Wait — but that seems too large? Let's check.
No — actually, if the interior angle at $ C $ is $ 32^\circ $, then the exterior angle adjacent to it (on the same side of the transversal) would be $ 180^\circ - 32^\circ = 148^\circ $.
But in the diagram, the angle $ x $ is shown as being on the opposite side of the transversal — wait.
Let’s re-express:
At point $ C $, the transversal splits the line $ BD $. The angles around point $ C $ are:
- One angle is $ x $, shaded pink, above $ BD $, to the right of $ AH $
- The angle below $ BD $, to the left of $ AH $, is $ 32^\circ $'s alternate interior angle → $ 32^\circ $
Wait — no. Actually, the $ 32^\circ $ angle is at $ F $, below $ EG $, on the left of the transversal.
Its alternate interior angle is at $ C $, above $ BD $, on the right of the transversal? No — alternate interior angles are on opposite sides of the transversal and between the lines.
So:
- At $ F $: $ 32^\circ $ is between the lines, on the left of the transversal.
- Then, the alternate interior angle at $ C $ is between the lines, on the right of the transversal.
So at point $ C $, the interior angle on the right side of the transversal is $ 32^\circ $.
But in the diagram, the angle $ x $ is above $ BD $, on the right side of the transversal — so it's not interior; it's exterior.
Wait — but if $ BD $ is the upper line, and $ AH $ cuts through it at $ C $, then the region above $ BD $ is outside the parallel lines.
So the angle $ x $ is not between the lines — it's outside.
So $ x $ is an exterior angle.
But the angle between the lines at $ C $, on the right side of the transversal, is $ 32^\circ $ (by alternate interior angles).
Then, the angle $ x $ is adjacent to that $ 32^\circ $ angle, forming a straight line along $ BD $.
So:
$$
x + 32^\circ = 180^\circ \Rightarrow x = 148^\circ
$$
Yes! So $ x = 148^\circ $
But wait — in the diagram, at point $ F $, there's already a $ 148^\circ $ angle. Is that a coincidence?
Let’s verify.
At $ F $, the angle $ 148^\circ $ is adjacent to the $ 32^\circ $ angle, and together they make $ 180^\circ $ — correct.
But the $ 148^\circ $ angle at $ F $ is exterior to the parallel lines — it's on the right side of the transversal, below $ EG $.
Its corresponding angle would be at $ C $, on the right side of the transversal, above $ BD $ — which is exactly where $ x $ is!
Ah! So $ x $ and the $ 148^\circ $ angle at $ F $ are corresponding angles.
Since $ BD \parallel EG $, corresponding angles are equal.
Therefore:
$$
x = 148^\circ
$$
✔ This matches.
Alternatively, using alternate interior angles:
- $ 32^\circ $ at $ F $ corresponds to the interior angle at $ C $ on the right side → $ 32^\circ $
- Then $ x $ is supplementary to that: $ x = 180^\circ - 32^\circ = 148^\circ $
Same result.
---
$$
\boxed{x = 148^\circ}
$$
---
- Lines $ BD $ and $ EG $ are parallel.
- Transversal $ AH $ intersects them.
- The $ 32^\circ $ angle at $ F $ has a corresponding interior angle at $ C $ (on the right) of $ 32^\circ $.
- The angle $ x $ is adjacent to this $ 32^\circ $ angle on line $ BD $, so they are supplementary.
- Therefore, $ x = 180^\circ - 32^\circ = 148^\circ $.
- Alternatively, $ x $ and the $ 148^\circ $ angle at $ F $ are corresponding angles, so they are equal.
Thus, $ \boxed{x = 148^\circ} $.
---
Given:
- Lines $ BD $ and $ EG $ are parallel (indicated by the arrows).
- Line $ AH $ is a transversal intersecting both parallel lines.
- At point $ F $, we have:
- One angle marked as $ 32^\circ $
- Another adjacent angle marked as $ 148^\circ $
- At point $ C $, there is an angle marked as $ x $, which is the one we need to find.
---
Step 1: Understand the angles at point F
At point $ F $, the transversal $ AH $ crosses line $ EG $. The angles around point $ F $ on the same side of the transversal are:
- $ 32^\circ $
- $ 148^\circ $
These two angles are adjacent and form a straight line (since they lie on line $ EG $), so their sum should be $ 180^\circ $:
$$
32^\circ + 148^\circ = 180^\circ
$$
✔ This checks out — they are supplementary.
Now, notice that the $ 32^\circ $ angle and the $ 148^\circ $ angle are on opposite sides of the transversal. But more importantly, the $ 32^\circ $ angle is between the transversal and the lower line $ EG $, and the $ 148^\circ $ is the other adjacent angle.
But here’s the key: The $ 32^\circ $ angle is an alternate interior angle with respect to the upper line $ BD $.
Wait — let's clarify.
Let’s look at the configuration:
- The transversal $ AH $ intersects:
- Line $ BD $ at point $ C $
- Line $ EG $ at point $ F $
- Since $ BD \parallel EG $, we can use properties of parallel lines and transversals.
---
Step 2: Use Alternate Interior Angles
At point $ F $, the angle between the transversal $ AH $ and line $ EG $ is $ 32^\circ $. That is, the interior angle on the left side of the transversal is $ 32^\circ $.
This $ 32^\circ $ angle has a corresponding alternate interior angle on the other side of the transversal, between the upper line $ BD $ and the transversal $ AH $, but on the opposite side.
That alternate interior angle would be located at point $ C $, on the same side of the transversal as the $ 32^\circ $ angle?
Wait — let's think carefully.
Actually, alternate interior angles are on opposite sides of the transversal and inside the parallel lines.
So:
- The $ 32^\circ $ angle at $ F $ is interior, on the left side of the transversal.
- Its alternate interior angle would be on the right side of the transversal, inside the parallel lines, at point $ C $.
But wait — in the diagram, the angle marked $ x $ is at point $ C $, and it's on the top right side of the transversal, outside the parallel lines? Wait — no.
Let’s define the positions:
- Line $ BD $ is above, $ EG $ below.
- Transversal $ AH $ goes from top-left to bottom-right.
- At point $ C $, the angle $ x $ is above line $ BD $, on the right side of the transversal.
But that means $ x $ is not an interior angle — it's an exterior angle.
Wait — perhaps we need to consider corresponding angles or supplementary angles.
Let’s try another approach.
---
Step 3: Use Vertical Angles and Supplementary Angles
At point $ F $, we know:
- The angle between the transversal and line $ EG $ is $ 32^\circ $.
- The adjacent angle is $ 148^\circ $, which is supplementary: $ 32^\circ + 148^\circ = 180^\circ $.
Now, the $ 32^\circ $ angle is interior, and since $ BD \parallel EG $, the corresponding angle at point $ C $ should be equal.
But where is the corresponding angle?
- The $ 32^\circ $ angle is on the left side of the transversal, below line $ EG $.
- Its corresponding angle would be on the left side of the transversal, above line $ BD $.
But the angle marked $ x $ is on the right side of the transversal.
So $ x $ is not corresponding to $ 32^\circ $.
Wait — perhaps $ x $ is supplementary to the corresponding angle.
Let’s look at the angles at point $ C $.
At point $ C $, the transversal $ AH $ crosses line $ BD $. The angle $ x $ is the angle above the line $ BD $, on the right side of the transversal.
That means $ x $ is an exterior angle.
But what is the interior angle at $ C $ on the left side?
Let’s suppose that the interior angle at $ C $, on the left side of the transversal, is equal to the $ 32^\circ $ angle at $ F $, because they are alternate interior angles.
So:
> Alternate interior angles: $ \angle $ at $ F $ (32°) = $ \angle $ at $ C $ (on the left side, interior)
So, the interior angle at $ C $ on the left is $ 32^\circ $.
Then, the angle $ x $ is adjacent to this $ 32^\circ $ angle, forming a straight line along $ BD $.
So:
$$
x + 32^\circ = 180^\circ
$$
$$
x = 180^\circ - 32^\circ = 148^\circ
$$
Wait — but that seems too large? Let's check.
No — actually, if the interior angle at $ C $ is $ 32^\circ $, then the exterior angle adjacent to it (on the same side of the transversal) would be $ 180^\circ - 32^\circ = 148^\circ $.
But in the diagram, the angle $ x $ is shown as being on the opposite side of the transversal — wait.
Let’s re-express:
At point $ C $, the transversal splits the line $ BD $. The angles around point $ C $ are:
- One angle is $ x $, shaded pink, above $ BD $, to the right of $ AH $
- The angle below $ BD $, to the left of $ AH $, is $ 32^\circ $'s alternate interior angle → $ 32^\circ $
Wait — no. Actually, the $ 32^\circ $ angle is at $ F $, below $ EG $, on the left of the transversal.
Its alternate interior angle is at $ C $, above $ BD $, on the right of the transversal? No — alternate interior angles are on opposite sides of the transversal and between the lines.
So:
- At $ F $: $ 32^\circ $ is between the lines, on the left of the transversal.
- Then, the alternate interior angle at $ C $ is between the lines, on the right of the transversal.
So at point $ C $, the interior angle on the right side of the transversal is $ 32^\circ $.
But in the diagram, the angle $ x $ is above $ BD $, on the right side of the transversal — so it's not interior; it's exterior.
Wait — but if $ BD $ is the upper line, and $ AH $ cuts through it at $ C $, then the region above $ BD $ is outside the parallel lines.
So the angle $ x $ is not between the lines — it's outside.
So $ x $ is an exterior angle.
But the angle between the lines at $ C $, on the right side of the transversal, is $ 32^\circ $ (by alternate interior angles).
Then, the angle $ x $ is adjacent to that $ 32^\circ $ angle, forming a straight line along $ BD $.
So:
$$
x + 32^\circ = 180^\circ \Rightarrow x = 148^\circ
$$
Yes! So $ x = 148^\circ $
But wait — in the diagram, at point $ F $, there's already a $ 148^\circ $ angle. Is that a coincidence?
Let’s verify.
At $ F $, the angle $ 148^\circ $ is adjacent to the $ 32^\circ $ angle, and together they make $ 180^\circ $ — correct.
But the $ 148^\circ $ angle at $ F $ is exterior to the parallel lines — it's on the right side of the transversal, below $ EG $.
Its corresponding angle would be at $ C $, on the right side of the transversal, above $ BD $ — which is exactly where $ x $ is!
Ah! So $ x $ and the $ 148^\circ $ angle at $ F $ are corresponding angles.
Since $ BD \parallel EG $, corresponding angles are equal.
Therefore:
$$
x = 148^\circ
$$
✔ This matches.
Alternatively, using alternate interior angles:
- $ 32^\circ $ at $ F $ corresponds to the interior angle at $ C $ on the right side → $ 32^\circ $
- Then $ x $ is supplementary to that: $ x = 180^\circ - 32^\circ = 148^\circ $
Same result.
---
✔ Final Answer:
$$
\boxed{x = 148^\circ}
$$
---
Explanation Summary:
- Lines $ BD $ and $ EG $ are parallel.
- Transversal $ AH $ intersects them.
- The $ 32^\circ $ angle at $ F $ has a corresponding interior angle at $ C $ (on the right) of $ 32^\circ $.
- The angle $ x $ is adjacent to this $ 32^\circ $ angle on line $ BD $, so they are supplementary.
- Therefore, $ x = 180^\circ - 32^\circ = 148^\circ $.
- Alternatively, $ x $ and the $ 148^\circ $ angle at $ F $ are corresponding angles, so they are equal.
Thus, $ \boxed{x = 148^\circ} $.
Parent Tip: Review the logic above to help your child master the concept of alternate angles worksheet.