In a triangle the sides are 4 cm, 5 cm and 4 cm. One of the base angle is 80°. Find the measure of the apex angel.

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MCQs on polygons and its classification, diagonals, sum angle property, polygons exterior angles measures, kinds of polygons, polygons properties and special cases.
 


In a triangle the sides are 4 cm, 5 cm and 4 cm. One of the base angle is 80°. Find the measure of the apex angel.