Height of an equilateral triangle is 12√3 units. Find its perimeter and area.
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answer :
perimeter of equilateral triangle = 3 a
= 3 ( 12√3 ) = 36√3
area of equilateral triangle = √3/4 a^2
= √3/4 ×(12√3)^2
= √3/4 × 432 ( 12^2 × √3^2 = 144×3 =432
= √3 × 108
= 108√3
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