Unit 4: Estimating, Time, and Shapes
Topic C: 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)
Add some examples of your own.
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.
- A door is a .
- This page is a .
- A yield sign is a .
- A room is usually a .
- A coin is a .
- A ten dollar bill is a .
- The rim of a jar is a .
- This warning sign is a .
- A pizza is a .
Answers to Exercise 1
- rectangle
- rectangle
- triangle
- rectangle
- circle
- rectangle
- circle
- triangle
- 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.
- A circle .
- A rectangle .
- A square .
- A triangle .
Exercise 3
Circle the correct shape in each line. Have your instructor check your answers.
- A rectangle
- A circle
- A square
- A triangle
Exercise 4
What shape are the following things? Write triangle, square, rectangle or circle.
Answers to Exercise 4
- circle
- triangle
- rectangle
- square
- rectangle or triangle
- circle
- square
- rectangle