Math · Stage 3
Right Angles — the Square Corner
A right angle is a square corner — a quarter turn. Other angles are smaller or larger than it.
✦ Math📘 Stage 3 · S3⏱ ~10 min🧒 Ages 7–8★ Free to start
I can identify a right angle as a square corner (a quarter turn) and compare other angles as smaller or larger than a right angle.
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Kavi's Square-Corner Hunt 📐
Kavi presses a wing into the corner of a window. "It fits perfectly — a square corner! That is a right angle," hoots Kavi. "It's the same as a quarter turn, like 12 round to 3 on a clock. Some angles are opened less and some opened more — let's hunt for square corners and compare the rest!"
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What your child will learn
1A right angle is a square cornerA right angle is a perfect square corner — the kind you see where two walls meet. A square has 4 square corners and a rectangle has 4 too. Tap each shape and look at its corners.
2A right angle is a quarter turnTurn from 12 round to 3 on a clock — that is a quarter turn, and the two hands make a perfect square corner. A quarter turn and a right angle are the same amount of turning.
3One quarter of a full turnA full turn goes all the way around a circle, split into 4 equal parts. A right angle is just 1 of those 4 parts — a quarter turn. Tap to shade one quarter.
4Smaller or larger than a right angle?Measure other angles against the square corner. If an angle opens less than a square corner it is smaller than a right angle. If it opens more it is larger. Tap each card.
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A peek inside
Kavi fits a wing snugly into the corner of a window 🪟 and it matches exactly. What kind of angle is that corner?
a perfect square corner → a right angle
Try this at home: A right angle is the same as a ___ corner.
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 3 · S3 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.