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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