With the help of heron's formula find the area and the altitude of an equilateral triangle
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Sides of equilateral triangle = 80cm
Area of EQUILATERAL triangle = ✓3/4a²
= ✓3/4 × (80)² = ✓3 / 4 × 6400 = ✓3× 1600 = 1600✓3 cm²
Perimeter of equilateral triangle = 3a = 3×80 = 240 cm
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