Similarity and Indirect Measurement

1
Similarity and Indirect Measurement
COURSE 3 LESSON 5-8
When a 6-ft student casts a 17-ft shadow, a
flagpole casts a shadow that is 51 ft long. Find
the height of the flagpole.
Set up a proportion for the similar triangles.
The height of the flagpole is 18 ft.
5-8
2
Similarity and Indirect Measurement
COURSE 3 LESSON 5-8
In the figure below, ABC EDC. Find d.
5-8
3
Similarity and Indirect Measurement
COURSE 3 LESSON 5-8
(continued)
Simplify.
312d 58,656
The length of d is 188 m.
5-8
4
Similarity and Indirect Measurement
COURSE 3 LESSON 5-8
1. A 5-ft tall student casts a 12-ft shadow. A
tree casts a 27-ft shadow. How tall is the
tree? 2. A 6-ft man casts a 9-ft shadow. A
sculpture casts a 45-ft shadow. How tall is the
sculpture?
11.25 ft tall
30 ft
5-8