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bekas [8.4K]
2 years ago
15

Find the value of x. If​ necessary, write your answer in the simplest radical form.

Mathematics
2 answers:
Zigmanuir [339]2 years ago
6 0

Answer is = 90°

Hope this helps

Paul [167]2 years ago
3 0

Answer:

x = 4\sqrt{5}

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 1² = 9²

x² + 1 = 81 ( subtract 1 from both sides )

x² = 80 ( take square root of both sides )

x = \sqrt{80} = \sqrt{16(5)} = \sqrt{16} × \sqrt{5} = 4\sqrt{5}

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