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Mathematics
15.08.2020 09:08
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3x^2 - 7x = 0 tìm nghiệm

3x^2 - 7x = 0 tìm nghiệm
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jonquil201
jonquil201
4,5(17 marks)

19.6 feet

Step-by-step explanation:

We know that

The hypotenuse is 20 feet, and the bottom leg is 4 feet.

We also know that Pythagorean theorem is used when there is one missing side to a triangle.

a^{2} + b^{2} = c^{2}

Substitute in a for 4 and c for 20. The hypotenuse is always the variable c.

4^2 + b^2 = 20^2

16 + b^2 = 400

b^2=384

\sqrt{384} = 19.6

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