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Pre-K · Maths · Lessons
Circle, square, triangle
⭕circle🟦square🔺triangle▭rectangle
Shapes.
The big ideaTurned or stretched, big or small, a shape keeps its name.

How it works

A shape keeps its name when it is turned or stretched, big or small.

A circle is round and has no corners. A triangle has 3 sides. A square has 4 equal sides.

Touch each side once as you count.

Sides• triangle: 3• square: 4No sides• circle: round, no corners
Shapes and sides.

Example 1: Count the sides

  1. Touch each side of a square once.
  2. 1, 2, 3, 4.
  3. A square has 4 sides.

Example 2: Turned

  1. A triangle is turned on its side.
  2. It still has 3 sides.
  3. It is still a triangle.

Example 3: Big or small

  1. A big circle and a small circle.
  2. Both are round.
  3. They are both circles.

Words to know

side
A straight edge of a shape.
corner
Where two sides meet.

Watch out

Try it

  1. How many sides does a triangle have?
  2. What is round with no corners?
  3. How many sides does a square have?
  4. Is a turned square still a square?
Answers: 1. three · 2. a circle · 3. four · 4. yes
For grown-upsGo on a shape hunt: find circles, squares and triangles around the house.
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