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26 June, 22:44

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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  1. 27 June, 02:30
    0
    25+87=112

    180-112=68

    so the angles are 25, 87, and 68

    since none of them are equal or greater than 90 degrees

    this triangle is acute

    The answer is (A)
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