A right triangle satisfies Pythagorean theorem. In this case we have 4^{2}+9^{2}=16+81=97 which is not equal to 12^{2}=144. Hence, it is not a right angle triangle.
Sofia C.
asked • 03/02/22a triangle has sides with lengths of 4 mm, 9 mm, and 12 mm. is it a right triangle
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