Geometry quiz with 5 questions on triangle properties and classifications.

Let’s go through each question one by one.

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Question 1: In a triangle, how many total degrees are there?

We know from geometry that the sum of all interior angles in any triangle is always 180 degrees. This doesn’t change — it’s true for every triangle, no matter its shape or size.

So:
- A (100%) → not about degrees
- B (it varies) → false, it’s always 180
- C (360 degrees) → that’s for quadrilaterals
- D (180 degrees) → ✔ correct

✔ Final Answer for Q1: D

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Question 2: The triangle shown has a square symbol at one corner.

That little square means it’s a right angle — exactly 90 degrees. So this triangle has one right angle → it’s called a right triangle.

Options:
- A (acute) → all angles less than 90 → no
- B (right triangle) → yes!
- C (obtuse) → one angle over 90 → no
- D (isosceles) → two sides equal → we can’t tell from the drawing alone, and the key clue is the right angle mark

✔ Final Answer for Q2: B

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Question 3: Green triangle with tick marks on all three sides.

The tick marks mean all three sides are equal in length. When all sides are equal, it’s an equilateral triangle. Also, in equilateral triangles, all angles are 60° — so it’s also acute, but the question is asking based on side lengths (since ticks show sides).

Options:
- A (scalene) → all sides different → no
- B (equilateral) → all sides same → ✔ yes
- C (right) → would need a 90° angle → no indication
- D (obtuse) → one angle >90 → no

✔ Final Answer for Q3: B

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Question 4: Triangle with side markings — one side has 1 tick, another has 2 ticks, third has 3 ticks.

Different numbers of ticks = different side lengths. So all three sides are unequal → that’s a scalene triangle.

Also note: the question says “Look at the sides” — so we’re classifying by side lengths, not angles.

Options:
- A (scalene) → all sides different → ✔ yes
- B (equilateral) → all sides same → no
- C (isosceles) → two sides same → no
- D (acute) → that’s about angles, not sides → not what’s being asked

✔ Final Answer for Q4: A

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Question 5: Triangle with side lengths labeled: 8, 7, and 3.

All three sides have different lengths → again, that’s a scalene triangle.

Even though 3 + 7 = 10 which is greater than 8, so it’s a valid triangle — but classification by sides: all different → scalene.

(No options shown for Q5 in your image, but since you included it, I’ll assume you want the answer.)

✔ Final Answer for Q5: scalene

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Final Answers:

1. D
2. B
3. B
4. A
5. scalene