check the picture below.
so it has a base of 18x18 and a height of that much.

If you're asking how, here's an example
A standard form equation is when it is set up.
Ax + By = C.
6x + 2y = 4.
A slope-intercept form equation is when it is set up y=mx+b.
Y = - 3x + 2.
4y = -8x + 16 then divide all by 4.
y = -2x + 4 slope form.
The factor of this expression would be 2(x+1)
A factor tree is a diagram used to determine the prime factors of a natural number greater than one.