If the perimeter of an equilateral triangle is 60 cm, then what is its area?
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11
Answer:
Perimeter of the given equilateral triangle = 60 cm. Length of each of its sides =603cm=20cm. =(100×1.732)cm2=173.2cm2. Hence, the area of the given triangle is 173.2 cm2.
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15
Given ,
The perimeter of an equilateral triangle is 60 cm . So , each side = (60÷3) cm
=20 cm
We know , area of an equilateral triangle
= √3(each side)(each side)/4 sq. unit
Area of the triangle = (√3 × 20×20)÷4 sq. cm
=√3×20×5 sq. cm
=100√3 sq. cm
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