Question

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

Answer 1

Answer:

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

Step-by-step explanation:

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

$12^2 = 144...(2)$

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

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

Thus, the given is not a right triangle.