lesson
A right angle is a quarter turn
1 · Learn
An angle measures a turn between directions or lines. A right angle is a quarter turn. Two right angles make a half turn.
Three right angles make three quarters of a turn, and four make a full turn. You can compare an angle with a right-angle corner to see whether it is smaller or larger.
2 · Worked example
I face north on a paper compass. A clockwise right-angle turn makes me face east.
3 · Your turn
How many right angles make three quarters of a turn? Is a smaller-than-quarter turn smaller than a right angle?
Check your answer
Three right angles; yes.
4 · Apply your learning
Use a folded paper right-angle corner to compare drawn angles. Keep the starting directions clear.
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Use objects or a drawn model before relying on a rule. Explain each step, check the units and revisit with varied examples. An adult can read the instructions without supplying the answer.
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