one side of a equillateral triangle is 8 cm find its area what is its altitude
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Answer:
Semi perimeter = (8+8+8)/2 = 12 cm
By Heron' Formula
area = √[s(s-a)(s-b)(s-c)]
=√[12×4×4×4]
=16√3 cm²
As we know that, area = (1/2)×base×altitude
⇒16√3 = (1/2)×8×altitude
⇒altitude = 4√3 cm
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