If the area of an equilateral triangle is 81√3 cm², then it’s height is ?
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Answered by
5
Step-by-step explanation:
area of equilateral triangle= √3 a² / 4 = 81 √3
a² = 81 / 4
so, a = 9/2
also, area of triangle = ½ x base x height
81√3 = ½ x 9/2 x height
so, height = 12√3 cm
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Answered by
5
Step-by-step explanation:
area of equilateral triangle = 81√3
√3a×a = 81√3
4
√3 get cancel on both side
a×a=81×4
a= √324
a=18
'A' is the side of the equilateral triangle
remaining will be in the photo
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