Let’s solve each angle step by step. We’ll measure (or estimate based on standard angles) and classify each one as acute, right, obtuse, or straight.
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1) The angle looks like it’s about 60° — less than 90°, so it’s
acute.
→ Angle:
60°, Type:
Acute
*(Note: In real life you’d use a protractor. Since this is a worksheet with clean drawings, we assume standard angles. This one is clearly not 45° or 90° — looks like 60°.)*
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2) This angle opens wider than 90° but less than 180° — that’s
obtuse. Looks like about 120°.
→ Angle:
120°, Type:
Obtuse
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3) This is a straight line with an arc over it — that means it’s a
straight angle, which is always
180°.
→ Angle:
180°, Type:
Straight
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4) This angle is small — definitely less than 90°. Looks like about 70°.
→ Angle:
70°, Type:
Acute
---
5) This angle is wide open — more than 90°, less than 180°. Looks like 135°.
→ Angle:
135°, Type:
Obtuse
---
6) There’s a little square in the corner — that means it’s exactly
90°, a
right angle.
→ Angle:
90°, Type:
Right
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✔ Double-checking:
- Acute = < 90° → #1, #4 ✔️
- Right = 90° → #6 ✔️
- Obtuse = >90° and <180° → #2, #5 ✔️
- Straight = 180° → #3 ✔️
All match!
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Final Answer:
1) Angle: 60°, Type: Acute
2) Angle: 120°, Type: Obtuse
3) Angle: 180°, Type: Straight
4) Angle: 70°, Type: Acute
5) Angle: 135°, Type: Obtuse
6) Angle: 90°, Type: Right
Parent Tip: Review the logic above to help your child master the concept of angles measurement worksheets.
