Virginia SOL Math / Kindergarten / Measurement & Geometry

K.MG.2

Shapes

What you'll learn

  • Name circles, triangles, squares, and rectangles
  • Tell how shapes are the same and different
  • Build shapes from parts

Words to know

Circle —
a round shape with no corners
Triangle —
a shape with 3 sides
Square —
a shape with 4 equal sides
Rectangle —
a shape with 4 sides
Corner —
where two sides meet

Why it matters Knowing shapes helps us talk about the world, like the round clock, the square window, and the triangle roof.

Worked examples

Model ItI do

How many sides does a triangle have?

Count each straight side of the triangle: 1, 2, 3. A triangle has 3 sides and 3 corners.

Try It TogetherWe do

How is a square different from a circle?

A square has 4 straight sides and 4 corners. A circle is round with no sides and no corners. That is how they are different.

Now YouYou do

How many sides does a rectangle have?

Count the straight sides of the rectangle. Check your answer in the back of this chapter.

Practice

Mastered 0 of 11

Warm-up

Ease in with the basics.

  1. 1.Which shape is round with no corners: a circle or a square?

  2. 2.How many sides does a triangle have?

  3. 3.How many corners does a square have?

On Level

The core Quick Check from the book.

  1. 1.Which shape is round with no corners?

  2. 2.How many sides does a square have?

  3. 3.How many corners does a triangle have?

  4. 4.A shape has 4 sides. Could it be a rectangle?

  5. 5.Which shape has 3 sides?

Challenge

Stretch your thinking.

  1. 1.A shape has 4 sides and 4 corners, and all of its sides are the same length. Is it a square or a triangle?

  2. 2.You put two triangles together to make a new shape with 4 sides. How many sides does the new shape have?

  3. 3.A triangle has 3 sides and a rectangle has 4 sides. How many sides do they have altogether?