The sides of a triangle are 3 1/2 cm, 4 2/5 cm and 5 1/4 respective. what is its perimeter
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31/2 = 15.5
42/5 = 8.4
51/4 = 12.75
Take 15.5 as the base.
Area of a triangle = ½bh
b = 15.5 cm
h = 7 cm
Area = ½ × 15.5 × 7
= 54.25
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