Question

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Answer 1

Given perimeter = 180 cm.

If one side is a, sum of sides will be 3a

= 3a = 180

= a= 60

Being an equilateral triangle, all sides will be a.

Semi perimeter (s) = perimeter/2 = 180/2 = 90

Heron's formula = ✓S(s-a)(s-b)(s-c)

= ✓90(90-60)(90-60)(90-60)

= ✓ 90 × 30 × 30 × 30

= ✓2430000

= 1558.84 [approx.]