Question

If a side-length of an equilateral triangle is 18, which is its area?

Answer 1

[sqrt(3)/4 ]* 18^2

Answer 2

thnks

Answer 3

i still can not find the right answer though

Answer 4

i got 60.75

Answer 5

then i got 243 and niether of them are right

Answer 6

This is the correct formula so just plug in the values

Answer 7

130.13

Answer 8

i did

Answer 9

the altitude = sqrt(18^2-9^2) = 15.588
area = 1/2 base x altitude
= 9 * 15.588 = 140.3