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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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In Exercise 29 to 32, use the fact that triangles are similar.

With 100 ft of string out, a kite is 64 ft above ground level. When the girl flying the kite pulls in 40 ft of string, the angle formed by the string and the ground does not change. What is the height of the kite above the ground after the 40 ft of string have been taken in? Chapter 5.2, Problem 30E, In Exercise 29 to 32, use the fact that triangles are similar. With 100 ft of string out, a kite is

To determine

To calculate:

The height of the kite above the ground after the 40ft of string.

Explanation

Given:

With 100ft of string out, a kite is 64ft above ground level. When the girl flying the kite pulls in 40ft of string, the angle formed by the string and the ground does not change.

Definition Used:

Similarity between Two polygons:

Two polygons are similar if and only if when all pairs of corresponding angles are congruent and all pairs of corresponding sides are proportional.

Calculation:

Here, AE¯ represents the original string, and CE¯ represents the string after 40ft.

According to the definition of segment-addition postulate, AE=AC+CE.

It is given that the length of the original string is AE=100ft.

The girl flying the kitepulls the string at AC=40ft.

So,

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