Blooper B.
asked • 07/22/20Find the measure of the third angle of a triangle if the measures of the other two angles are given. 31.8 and 89.8
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1 Expert Answer
William W. answered • 07/22/20
Tutor
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Experienced Tutor and Retired Engineer
The angles of a triangle ALWAYS add up to 180° so if "x" is the third angle, then x + 31.8° + 89.8° = 180°.
Solve for "x" be subtracting 31.8 and 89.8 from both sides of the equation.
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Sami S.
All Triangle angles add up to 180 deg. 180 = a + b + c , a is known and equals 31.8, b is known and equals 89.9, then, 31.8 + 89.8 + c =180, angle c = 180 - (121.6), angle c = 58.4 deg.07/22/20