Find the length of the third side. If necessary, write in simplest radical form. 472 9

Mathematics

1 answer:

Marat540 [252]2 years ago

4 0

Answer:

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

let the third side be x , then

x² + (4 $\sqrt{2}$ )² = 9²

x² + 32 = 81 ( subtract 32 from both sides )

x² = 49 ( take the square root of both sides )

x = $\sqrt{49}$ = 7

Then the third side is 7

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