1.

Two angles of a triangle are of measures 150° and 30°. Find the measure of the third angle.

Answer»

Given two angles of a triangle are of measures 150° and 30°

Let the required third angle be x

We know that sum of all the angles of a triangle = 180°

105° + 30° + x = 180°

135° + x = 180°

x = 180° – 135°

x = 45°

Therefore the third angle is 45°



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