Let’s go through each angle one by one. We’ll estimate the size of each angle based on how it looks, since we can’t use a real protractor here — but we know what acute, right, obtuse, and straight angles look like!
Remember:
- Acute angle = less than 90° (small, sharp)
- Right angle = exactly 90° (like the corner of a square)
- Obtuse angle = more than 90° but less than 180° (wide open)
- Straight angle = exactly 180° (a straight line)
Now let’s check each one:
1. This angle is small — definitely less than 90°. So it’s
acute. Let’s say about 45°.
2. This angle is wide — bigger than 90°, but not a straight line. So it’s
obtuse. Maybe around 135°.
3. Also wide — looks like it’s over 90°, so
obtuse. About 120°.
4. This is a straight line — both arrows pointing opposite ways. That’s
straight, which is 180°.
5. This looks like a perfect L-shape — that’s a
right angle. Exactly 90°.
6. Very small angle — much less than 90°.
Acute. Maybe 30°.
7. Wide angle — more than 90°, less than 180°.
Obtuse. Around 100°.
8. Another L-shape, just turned — still a
right angle. 90°.
9. Small angle again — less than 90°.
Acute. About 45°.
We don’t need exact degrees for this worksheet — just the type of angle. But if you were using a protractor, you’d measure to confirm.
Final Answer:
1. acute
2. obtuse
3. obtuse
4. straight
5. right
6. acute
7. obtuse
8. right
9. acute
Parent Tip: Review the logic above to help your child master the concept of angles worksheets.
