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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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Angle Sum Property of a triangle states that the sum of all the interior angles of a triangle is equal to 180°.


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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