Proportionality and Similar Shapes

• F
• G
• H
• J

Figures that have the same shape and different size are called ________.

• congruent figures

• similar figures

• complementary figures

• supplementary figures

How many times an object is getting bigger or smaller is called a ___________

• proportion

• scale factor

• perimeter

• area

If a scale uses 2 centimeters to represent 6 feet, how many centimeters will be used to represent 21 feet?

• 7 cm

• 5 cm

• 3.5 cm

• 7.5 cm

• A

  13.5

• B

  12

• C

  9.5

• D

  Not here

What is the value of d in millimeters?

Which measurements in centimeters represents the dimensions of a triangle that is similar to triangles QRS?

• A

  8cm, 14cm, 17cm

• B

  10cm, 20cm, 25cm

• C

  4cm, 10cm, 13cm

• D

  12cm, 24cm, 36cm

The diagram shows a door that has a window in it. The front faces of the door and the window are similar rectangles that have the dimensions shown.

What is h, the height of the window in centimeters.

• F

  66 cm

• G

  186 cm

• H

  150 cm

• J

  Not here

Triangle ABC is similar to triangle FGH.

What is the value of x in centimeters?

• F

  22.5 cm

• G

  8 cm

• H

  10.8 cm

• J

  30 cm

A student made a model of the Washington Monument using a scale in which 1 inch represents 15 feet. The actual height of the Washington Monument is approximately 555 feet. Which measurement is closet to the height of the model in inches?