Unit 4: Estimating, Time, and Shapes

# Circle

The circle is a shape we all know. These objects suggest the idea of a circle:

• rim of coffee cups and glasses
• top of lamp shades top of cans of food
• compact discs
• the ends of pipes and hoses (called the cross-section)
• the coloured part of your eye (the iris)

# Triangle

A triangle is a three-sided shape. Triangles have three sides and three angles. Draw some different sized triangles here.

# Rectangle

A rectangle is a four-sided shape. Rectangles have four sides and four right angles (square corners). Can you think of anything that has a rectangle shape? Write it here.

# Square

A square is a special kind of rectangle. Squares have square corners and all four sides are the same length. Can you think of anything that has a square shape? Write it here.

Exercise 1

The following things give the idea of a shape. Write the name of the shape in each blank. Then draw the shape.

Example:

A cookie is a circle. 1. A door is a          .
3. A yield sign is a          .
4. A room is usually a          .
5. A coin is a          .
6. A ten dollar bill is a          .
7. The rim of a jar is a          .
8. This warning sign is a          . 9. A pizza is a          .

1. rectangle
2. rectangle
3. triangle
4. rectangle
5. circle
6. rectangle
7. circle
8. triangle
9. circle

Exercise 2

Look around the room and find each of the following shapes. Write the name on the line. Have your instructor check your answers.

Example:

A rectangle door.

1. A circle          .
2. A rectangle          .
3. A square          .
4. A triangle          .

Exercise 3

1. A rectangle 2. A circle 3. A square 4. A triangle Exercise 4

What shape are the following things? Write triangle, square, rectangle or circle.

1. 2. 3. 4. 5. 6. 7. 8. 1. circle
2. triangle
3. rectangle
4. square
5. rectangle or triangle
6. circle
7. square
8. rectangle 