If x denotes the length of a side of an equilateral triangle, express the area of the triangle as a function of x.

Using the concept of an equilateral triangle, it is found that it's area is given by:

The height is one side of a right triangle, in which the other side is half the base and the other is the base, thus, applying the Pythagorean Theorem:

Then, the area is:

A similar problem is given at link

12cm

the answer is d

it is true

step-by-step explanation:

all the combinations add up i used   calculator