🔢Math Standard
Types of Angles Worksheet (Acute, Right, Obtuse)
Look at each angle and tell whether it is acute (less than a right angle), right, or obtuse (more than a right angle).
4th Grade 12 min
✓ Answer key
4th Grade · Math
4th Grade Geometry Worksheets
Before this skill
- Knowing a right angle is 90 degrees
- Recognizing rays and a vertex
Common mistakes to watch for
- Confusing acute and obtuse
- Judging by ray length instead of the opening
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Frequently Asked Questions
What do 4th Grade students practice with geometry?
Students will classify angles as acute, right, or obtuse by comparing them to a right angle.
Are these worksheets free and printable?
Yes — every worksheet is a free, printable PDF with an answer key. No sign-up required.