In a 30°-60° - 90° triangle, the shorter leg is 6 ft long. Find the length of the other two sides to
the nearest tenth.

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Ответ:

USofA8397

02.05.2021

Mathematics

we know that

$(x-a)^{2} =x^{2} -2ax+a^{2}$

we have

$x^{2}- 5x + (\ )$

in this problem

$-2ax=-5x\\2a=5\\a=(5/2)$

Substitute

$(x-\frac{5}{2})^{2} =x^{2} -2*\frac{5}{2}x+(\frac{5}{2})^{2}\\ \\= x^{2} -5x+(\frac{25}{4})$

therefore

the answer is the option C

$\frac{25}{4}$

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In a 30°-60° - 90° triangle, the shorter leg is 6 ft long. Find the length of the other two sides to the nearest tenth.