SAT Question f39f88b7: Area and Volume answer and explanation with Desmos solution

The area, $A$, of a triangle can be found using the formula $A=\frac{1}{2}bh$, where $b$ is the base length of the triangle and $h$ is the height of the triangle. It’s given that the triangle has a base length of $40$ centimeters and a height of $90$ centimeters. Substituting $40$ for $b$ and $90$ for $h$ in the formula $A=\frac{1}{2}bh$ yields $A=\frac{1}{2}\left(40\right)\left(90\right)$, or $A=1,800$. Therefore, the area, in square centimeters, of the triangle is $1,800$.