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Watch help video Find the length of the third side. If necessary, write in simplest radical form. 7 4√2

Watch Help Video Find The Length Of The Third Side If Necessary Write In Simplest Radical Form 7 42 class=

Sagot :

9

1) In this right triangle we can find the missing leg by using the Pythagorean Theorem.

2)

a² = b² + c² Note that the hypotenuse is unknown so far

a² = 7² + (4√2)²

a² = 49 +(16 x2)

a² = 49 +32

a² =81 Take the square root on both sides

√a² = √81

a = -9, 9 Negative numbers for dimensions are not convenient.

a = 9

3) Hence, the answer is 9

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