Question

find the area of an equilateral triangle whose perimeter is 60cm

Answer 1

Step-by-step explanation:

perimeter of equilateral triangle = 3a

3a = 60 cm

a = 20cm

area of equilateral triangle = √3/4 a^2

that is √3/4 * 20^2

= √3 /4 * 400

= 100√ 3 cm^2

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Answer 2

Equilateral triangle has equal sides. Let the measure of side be x cm
Perimeter = 3*side
60=3x
20=x
Area of equilateral triangle =_/3a^2/4
=>_/3 * 30*30/4
=> 225_/3 cm sq

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