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A triangle has side lengths 9, 10, and 12. Is it acute, obtuse, or right? Explain.
A. Right; 92 + 102 = 181 and 122 = 144, so a? + b2 = c2.
O
B. Obtuse; 92 + 102 = 181 and 122 = 144, so a+ b2 < c.
C. Acute; 92 + 102 = 181 and 122 = 144, so a2 + b2 >c2.

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Ryanoop13
It is an acute scalene triangle in other words just acute because the two shorter sides (9 and 10 is 19 and 12 squared is 144) well if that doesn’t make sense.....your answer would be c.

I dont really understand what yours asking but that triangle is acute because its sides are less then 90 degrees. Does that help??

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