Let’s go through each angle one by one. We’ll use the protractor shown in each diagram to measure the acute angle (the smaller angle, less than 90°).
Remember:
- The protractor has two scales — inner and outer.
- Always start from 0° on the side where the angle’s base line is aligned.
- Read the number where the other ray of the angle points.
---
Top Left Angle:
The bottom ray is along the 0° mark on the
inner scale (right side).
The top ray points to
10° on the inner scale.
→ So, this angle is
10°.
---
Top Right Angle:
Bottom ray is at 0° on the
outer scale (left side).
Top ray points to
45° on the outer scale.
→ So, this angle is
45°.
---
Middle Left Angle:
Bottom ray is at 0° on the
inner scale (right side).
Top ray points to
85° on the inner scale.
→ So, this angle is
85°.
---
Middle Right Angle:
Bottom ray is at 0° on the
outer scale (left side).
Top ray points to
55° on the outer scale.
→ So, this angle is
55°.
---
Bottom Left Angle:
Bottom ray is at 0° on the
inner scale (right side).
Top ray points to
35° on the inner scale.
→ So, this angle is
35°.
---
Bottom Right Angle:
Bottom ray is at 0° on the
inner scale (right side).
Top ray points to
75° on the inner scale.
→ So, this angle is
75°.
---
Final Answer:
10°, 45°, 85°, 55°, 35°, 75°
Parent Tip: Review the logic above to help your child master the concept of acute angles worksheet.
