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Andrei [34K]
3 years ago
7

Pls I need help this

Mathematics
1 answer:
Citrus2011 [14]3 years ago
6 0

Answer:

the third side is 4.

Step-by-step explanation:

Using  Pythagorean theorem of a^2 + b^2 = c^2 for right triangles, substitute

the numbers to show (\sqrt{65})^{2} + b^{2} = 9^{2} and solve for b. The square root and square cancel each other out, so you get 65 + b^{2} = 81.

Subtract 65 from both sides to get b^{2} = 16.

Then take the square root of both sides to get b = \sqrt{16} which equals 4.

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