Area and Perimeter Practice Test 1

Question : 35 of 40

Marks: +1, -0

The area of a triangular field, the lengths of whose sides are 50m, 78m and 112m is:

Solution:

s =

{50 + 78 + 112}/{2}

{240}/2

= 120 m
Area of triangle =

√{120(120-50)(120-78)-(120-112)}

√{120×70×42×8}

√{2×2×2×3×5×2×5×7×2×3×7×2×2×2}

= 2 × 2 × 2 × 2 × 3 × 5 × 7
= 1680

m^2

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