The perimeter of an equilateral triangle is 54cm. Find its area
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Answered by
6
a + a + a = 54 ( sum of all sides= perimeter)
3a=54
a =54/3
=18
area of equilateral triangle = (root3/2) a^2
= (root3/2) 18*18
= 162 root3
( sorry dont have the symbol for root pls adjst with this )
3a=54
a =54/3
=18
area of equilateral triangle = (root3/2) a^2
= (root3/2) 18*18
= 162 root3
( sorry dont have the symbol for root pls adjst with this )
Answered by
11
we know that
a+a+a=54. (all sides are equal)
3a = 54
a = 54÷3
a = 18
area of equilateral triangle = √3/4 × 18×18
√3/4 ×324
81√3
a+a+a=54. (all sides are equal)
3a = 54
a = 54÷3
a = 18
area of equilateral triangle = √3/4 × 18×18
√3/4 ×324
81√3
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