38. Shown in the standard (x,y) coordinate plane below is equilateral triangle △AOC with coordinates A(a, b), C(4c, 0), and O(0, 0). In terms of c, what is a ?

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

For an equilateral triangle, any vertex is a point on the angle bisector of its opposite side, so the abscissa of point A is equal to half of OC, which is 2c