Right Angles & Turns
Identify right angles; recognise that two right angles make a half-turn, three make three-quarters, and four make a complete turn
What a learner can do afterwards
- Use a right-angle checker to identify right angles in shapes and the environment
- Classify angles as right angles, less than a right angle, or greater than a right angle
- Explain that 4 right angles make a full turn (360°)
The lesson
A right angle is a square corner. Think of the corner of this page, or the letter L. You already know some angles are wide and some are narrow. A right angle sits exactly in between: not too wide, not too narrow.
Zara faces the number 12 on a clock. She turns until she faces the 3 instead. That turn is called a quarter turn, and it makes exactly one right angle.
One right angle is a quarter turn. Two right angles make a half turn. Three right angles make three-quarters of a turn. Four right angles bring you all the way around: a full turn.
You can test any corner with a right-angle checker. Fold a piece of paper in half, then in half again. The folded corner is a perfect right angle. Hold it against a corner to see if it fits.
A right angle is a square corner, and four right angles make one full turn all the way around.
Watch it
Where it sits
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.