To solve the problem of measuring each angle formed between a pair of rays using a protractor, let's go through the steps for each image provided. The task involves identifying and measuring the angles accurately.
Step-by-Step Solution:
####
Image 1:
1.
Identify the Vertex and Rays:
- The vertex is the point where the two rays meet.
- One ray points to the left, and the other ray extends outward.
2.
Position the Protractor:
- Place the center of the protractor (usually marked with a dot or crosshair) exactly on the vertex of the angle.
- Align one of the rays with the baseline of the protractor (the straight line at the bottom of the protractor).
3.
Read the Angle:
- Look at the scale that starts from 0° along the baseline.
- Follow the second ray to see where it intersects the protractor's scale.
- In this case, the second ray intersects the scale at
70°.
4.
Record the Angle:
- The angle measured is
70°.
####
Image 2:
1.
Identify the Vertex and Rays:
- The vertex is the point where the two rays meet.
- One ray points upward, and the other ray extends outward.
2.
Position the Protractor:
- Place the center of the protractor on the vertex of the angle.
- Align one of the rays with the baseline of the protractor.
3.
Read the Angle:
- Look at the scale that starts from 0° along the baseline.
- Follow the second ray to see where it intersects the protractor's scale.
- In this case, the second ray intersects the scale at
125°.
4.
Record the Angle:
- The angle measured is
125°.
####
Image 3:
1.
Identify the Vertex and Rays:
- The vertex is the point where the two rays meet.
- One ray points downward, and the other ray extends outward.
2.
Position the Protractor:
- Place the center of the protractor on the vertex of the angle.
- Align one of the rays with the baseline of the protractor.
3.
Read the Angle:
- Look at the scale that starts from 0° along the baseline.
- Follow the second ray to see where it intersects the protractor's scale.
- In this case, the second ray intersects the scale at
40°.
4.
Record the Angle:
- The angle measured is
40°.
####
Image 4:
1.
Identify the Vertex and Rays:
- The vertex is the point where the two rays meet.
- One ray points upward, and the other ray extends outward.
2.
Position the Protractor:
- Place the center of the protractor on the vertex of the angle.
- Align one of the rays with the baseline of the protractor.
3.
Read the Angle:
- Look at the scale that starts from 0° along the baseline.
- Follow the second ray to see where it intersects the protractor's scale.
- In this case, the second ray intersects the scale at
130°.
4.
Record the Angle:
- The angle measured is
130°.
Final Answer:
- Image 1:
70°
- Image 2:
125°
- Image 3:
40°
- Image 4:
130°
$$
\boxed{70^\circ, 125^\circ, 40^\circ, 130^\circ}
$$
Parent Tip: Review the logic above to help your child master the concept of printable math worksheets measuring angles.
