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Question

Find the area of an isosceles triangle having the base x cm and one side y cm.

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Solution

Let us assume triangle ABC be the given isosceles triangle having sides AB = AC and base BC. The area of a triangle ABC, say A having given sides AB and AC equals to y cm and given base BC equals to x cm is given by

Where,

Base = BC = x cm; Height = y2-x24

A=12Base×Height=12×xy2-x24=x2y2-x24


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