Question

2. Find area of an equilateral triangle whose perimeter is 15 Cm.​

Answer 1

In equilateral triangle all three sides are equal so let one side be x

Perimeter= 3x

15 = 3x

x= 5 cm

area = 1/2 * base * height

= 1/2 * 5 * rt3/2 * 5

= 25root3 cm square

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