height of an equilateral triangle is 9 cm find the area of a triangle
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Height of equilateral triangle = 9 cm
√3/2 × side = 9 cm
Side = 9 × 2 / √3
Side = 6√2 cm.
Area of equilateral triangle = √3 /4 × Side²
= √3/4 × (6√2)²
=> √3/4 × 72 cm².
=> 18√3 cm².
√3/2 × side = 9 cm
Side = 9 × 2 / √3
Side = 6√2 cm.
Area of equilateral triangle = √3 /4 × Side²
= √3/4 × (6√2)²
=> √3/4 × 72 cm².
=> 18√3 cm².
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