Geometry Playground

Hands-on geometry: drag the arm of an angle on a protractor, work out the third angle of a triangle, and find the missing side of a right triangle.

13–16 years
Read aloud
No ads
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Geometry Playground, a screen from the game

What your child learns

Measuring angles with a protractor
The angles of a triangle add up to 180°
The Pythagorean theorem

How to play

Drag the angle’s arm to the size asked (within 5°), then find the missing angle, then the missing side.

Levels

Level 1Make the angle on the protractor.
Level 2The triangle’s missing angle.
Level 3The missing side, with Pythagoras.

A tip for parents

Check a corner of a room with a 3–4–5 string triangle, like builders do.

Works on phones, tablets and computers, with nothing to install. No ads and no tracking.