Let’s go step by step to match each angle type with its correct degree measure.
We are given 6 angle types and 7 possible degree measures. We need to pick the right one for each.
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1) Right angle
A right angle is exactly
90°.
→ Match:
90°
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2) Acute angle
An acute angle is *less than* 90°.
Looking at options:
- <90° → this fits!
→ Match:
<90°
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3) Straight angle
A straight angle is a flat line — that’s
180°.
→ Match:
180°
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4) Reflex angle
A reflex angle is *more than 180° but less than 360°*.
Looking at options:
- >180° → this is correct (it doesn’t say “and less than 360”, but in basic geometry, reflex means between 180 and 360).
Note: There’s also “>90°, <180°” — that’s obtuse, not reflex.
So reflex =
>180°
Wait — let’s check all options again:
Options listed:
- 360°
- 90°
- >180°
- >90°, <180°
- 180°
- <90°
Yes,
>180° is the best match for reflex.
→ Match:
>180°
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5) Complete rotation
One full turn around a circle is
360°.
→ Match:
360°
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6) Obtuse angle
Obtuse angles are *greater than 90° but less than 180°*.
That matches:
>90°, <180°
→ Match:
>90°, <180°
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Now let’s list them clearly:
1) Right angle → 90°
2) Acute angle → <90°
3) Straight angle → 180°
4) Reflex angle → >180°
5) Complete rotation → 360°
6) Obtuse angle → >90°, <180°
All matches are unique and fit standard definitions.
Final Answer:
1) 90°
2) <90°
3) 180°
4) >180°
5) 360°
6) >90°, <180°
Parent Tip: Review the logic above to help your child master the concept of angle worksheet 4th grade.
