A triangle has sides of lengths 9, 7, and 12. Is it a right triangle? Explain.

asked Jan 2, 2021 85.2k views

2 votes

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1 vote

Answer:

No,
$9^2 +7^2 \\eq 12^2$

Explanation:

9^2 +7^2 = 81+ 49 =130...(1)

12^2 = 144...(2)

From equations (1) & (2) it is obvious that:

$9^2 +7^2 \\eq 12^2$

Thus, the given is not a right triangle.

Shreeni answered Jan 6, 2021

5.5k points

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