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

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.