# The perimeter of a triangular field is 240 dm. If two of its sides are 78 dm and 50 dm,

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The perimeter of a triangular field is 240 dm. If two of its sides are 78 dm and 50 dm, find the length of the perpendicular on the side of length 50 dm from the opposite vertex.

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ABC be the triangle,

Here a = 78 dm = AB, BC = b = 50 dm