🔢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
Fourth grade geometry shifts from naming shapes to describing their properties: lines and rays, right angles, triangles and quadrilaterals, lines of symmetry, and perimeter. These free printable 4th grade geometry worksheets build that vocabulary through drawing, sorting, and measurement tasks. Each worksheet has a printable answer key, and the easy, standard, and challenge tiers make it simple to meet students where they are.
Reviewed by ClassReady Editorial Team Last updated August 2026
Before this skill
- Identifying basic 2-D shapes
- Understanding parallel and perpendicular lines
- Comparing lengths and angles informally
Common mistakes to watch for
- Confusing a ray with a line segment
- Calling any four-sided shape a square
- Missing a line of symmetry when a shape is asymmetric
Filter:
Related Skills
Frequently Asked Questions
What geometry skills do 4th graders learn?
Fourth graders learn about points, lines, rays, and angles; classify triangles and quadrilaterals by their attributes; find lines of symmetry; and measure and add angle measures.
How can students tell a square from other quadrilaterals?
A square has four right angles and four equal sides. Other four-sided shapes — rectangles, rhombi, and trapezoids — fail one or both tests.
Are these geometry worksheets free and printable?
Yes. Every worksheet is a free, printable PDF with an answer key, and no sign-up is required.