The measures of two angles of a triangle are 25° and 87°. Is the triangle acute, right, or obtuse? Explain.
A. Acute; the measure of the third angle is 68°. So all three angles are acute.
B. Acute; the measure of the third angle is 78°. So all three angles are acute.
C. Obtuse; 25° + 87° = 112° and 112° is an obtuse angle.
D. Right; 25° + 87° = 112° and 202° - - 112° = 90°. Previous Next
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