Question #7aa44

1 Answer
SCooke
Feb 7, 2017

Sometimes, drawing and measuring are easier than trigonometric calculation!

Explanation:

Use a common scale for the line drawings, e.g. 0.5cm = 1m should fit on a page. Draw the shown figure and use the protractor to find the angle as #33.7^o#.
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This is confirmed by the trigonometric calculation tan Á = opposite side/adjacent side. tan Á = 10/15 = 0.6667. Á = 33.7

In practice you can use this to find the height of a tree from its shadow and a protractor.

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