Mathematics

8th

grade

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Dilations effects on area and perimeter

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  • 1. Multiple Choice
    2 minutes
    1 pt

    A triangle ABC with sides AB = 8, BC = 16, and AC = 17 is dilated to form a triangle with side B'C' = 8. Which of the following statements about the sides of the image of triangle ABC?

    A'B' = 8

    and A'C' = 17

    A'B' = 0

    and A'C' = 9

    A'B' = 4

    and A'C' = 8.5

    Impossible to determine

  • 2. Multiple Choice
    30 seconds
    1 pt

    Two objects that are the same shape but NOT the same size are _______.

    Congruent

    Vertical

    Similar

    Complementary

  • 3. Multiple Choice
    1 minute
    1 pt

    A figure is dilated by a scale factor of 4. Which of the following statements about the figure must be true?

    The perimeter and area are both multiplied by 4.

    The perimeter is multiplied by 4 and the area is multiplied by 16.

    The perimeter and area are both divided by 4.

    The perimeter is multiplied by 16 and the area is multiplied by 4.

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