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Question

if the base and attitude of a triangle are doubled , what happens to the area

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Solution

Let the original base of = bLet the original altitude of = hNow, original area , A = 12×base×altitude = 12bhNow, new base = b1 = 2bnew altitude, h1 = 2hNew area, A1 = 12×new base×new altitude = 12b1h1 = 12×2b×2h = 4× 12bh = 4ASo, A1 = 4ASo, new area of the will be 4 times the original area.

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