
Jesset C.
asked 04/28/20What is the area of an equilateral triangle XYZ if side XZ has a length of √3 ?
What is the area of an equilateral triangle XYZ if side XZ has a length of √3 ?
(A) (3√3)/4
(B) 3
(C) 3/2
(D) 3√3
(E) None of the above
I got; (A) (3√3)/4. Would this be the correct answer?
1 Expert Answer

Arturo O. answered 04/28/20
Experienced Physics Teacher for Physics Tutoring
A = 1/2 x base x height
base = √3
height = √3 sin60° = √3 (√3 / 2) = 3/2
A = (1/2) (√3) (3/2) = (3/4) √3
I agree with your answer.
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Doug C.
Yes, that would be correct. You can get that answer by dropping an altitude from one vertex creating two 30-60-90 right triangles, allowing you to determine base and height. Once you have done that a few times you start to realize that A = s^2 sqrt(3)/4 where s is a side length.04/28/20