geometry

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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This is a geometry question.
20. You can estimate the height of a flagpole by placing a
mirror on level ground so that you see the top of the
flagpole in it. The girl shown is 172 cm tall. Her eyes
are about 12 cm from the top of her head. By measurement,
AM is about 120 cm and A'M is about 4.5 m. From
physics it is known that 21 = 2 2. Explain why the
triangles are similar and find the approximate height of
the pole.
Mirror
A
M
A'
Transcribed Image Text:20. You can estimate the height of a flagpole by placing a mirror on level ground so that you see the top of the flagpole in it. The girl shown is 172 cm tall. Her eyes are about 12 cm from the top of her head. By measurement, AM is about 120 cm and A'M is about 4.5 m. From physics it is known that 21 = 2 2. Explain why the triangles are similar and find the approximate height of the pole. Mirror A M A'
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