2 Answers

Nathanial · Answer 1 · 2019-06-25T01:07:53+0000

We use Pitagorean equation to find the hypotenuse which is the longest side of the triangle.

$a {}^(2) + b {}^(2) = c {}^(2)$

a = 31 - 16

This is to find the lenght of the base of the triangle.

a = 15

${15}^(2) + {20}^(2) = {c}^(2)$

$225 + 400 = {c}^(2)$

$625 = {c}^(2)$
Now we need to eliminate that c squared to get the length of the hypotenuse. And we do that by taking the square root of both side of the equation.

$√(625) = \sqrt{ {c}^(2) } \\ c = 25$

Shylene · Answer 2 · 2019-06-29T02:58:34+0000

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Find the base of the triangle
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31 - 16 = 15ft

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Formula
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a² + b² = c²

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Find missing length
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15² + 20² = c²
c² = 625
c = √625
c = 25

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Answer: The missing length is 25 ft
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