PEAZIT Aha card
Go straight to resources ↓A right angle is a quarter turn
A full turn is 360°. A quarter turn is 90°: a right angle. Its arms are perpendicular.
| Rotation | Size | Angle |
|---|---|---|
| Quarter turn | 90° | Right |
| Half turn | 180° | Straight |
| Full turn | 360° | Full |
One worked example
- Corner of a rectangleAdjacent sides meet at 90°.
- Extend both sidesThe opening stays the same.
- Rotate the whole rectangleThe angle remains right even if neither side is horizontal.
Watch out: A right angle need not look like an upright letter L. Rotating the drawing or changing the arm lengths does not change its size.
Goal, prerequisites and card origin
What you will learn: Recognise a right angle and connect it to rotation.
What you need first: Distinguish a line from a ray.
An original PEAZIT working card. Independent expert review and effectiveness testing have not yet taken place. · v1
Show connections
A full turn is 360°. A quarter turn is 90°: a right angle. Its arms are perpendicular.