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4.3: Topic C- Shapes

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    95406

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    Topic C: Shapes

    Circle

    The circle is a shape we all know.

    a medium size red circle, a small yellow circle, a big blue circle

    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.three different sized triangles in different colours

    Draw some different sized triangles here.

    Rectangle

    A rectangle is a four-sided shape. Rectangles have four sides and four right angles (square corners).

    three different sized rectangles in different colours

    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.three different sized circles in different colours

    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 circle

    1. A door is a _____ .
    2. This page 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 _____ .

    a warning sign with three sides and three angles

    i. A pizza is a _____ .

    Answers to Exercise 1

    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

    Circle the correct shape in each line. Have your instructor check your answers.

    a. A rectangle

    a circle, a rectangle, a square, a triangle

    b. A circle

    a square, a triangle, a rectangle, a circle

    c. A square

    a rectangle, a circle, a square, a triangle

    d. A triangle

    a triangle, a square, a circle, a rectangle

    Exercise 4

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

    1. a round clock
    2. a pine tree
    3. a cell phone
    4. a chess board
    5. a photograph of a house
    6. a bowl
    7. a frying pan with 4 corners and 4 equal sides
    8. the Canadian flag

    Answers to Exercise 4

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

    This page titled 4.3: Topic C- Shapes is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by via source content that was edited to the style and standards of the LibreTexts platform.

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