2.2 Review Worksheet, Part 1 (continued)

19. The image shows a dust mite as seen under a microscope. The actual length of this dust mite is 0.3 millimeter. Use a ruler to measure the length of the dust mite in the image in millimeters. What is the scale of the drawing?

2.2.2 Applications of Proportion

Find the value of x in each diagram.

20. △ LMN ~ △ RST

21. prism A ~ prism B

R

A

4 m

L

2 in.

2 m

x in.

S

B

M

4 m

x m

N

T

10 in.

35 in.

22. Write and solve a proportion to find the height of the taller tree in the diagram at right.

h

18 ft

42 ft

20 ft

23. A triangle has side lengths of 5 inches, 12 inches, and 15 inches. Every dimension is multiplied by 1/5 to form a new triangle. How is the ratio of the perimeters related to the ratio of corresponding sides?

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