Q3 of 33 Page 12

The perimeter of a triangular field is 240 m. It's two sides are 78 m and 50 m. Find the length of the altitude on the side of 50 m length from its opposite vertex.

Let the three sides of the triangle be a, b, c, then perimeter = a + b + c.
... 240 = 50 + 78 + c or c = 112 m

Area of the triangle =
Or    ´ base ´ height =
Þ  ´ 50 ´ h =
∴ h = 67.2 m

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