Use the area of the rectangle to find the area of the triangle

“A diagonal of a rectangle separates the rectangle into two congruent triangles. The area of each triangle is one-half the area of the rectangle. So, the area A of a triangle is given by the formula A=12bh where b is the base and h is the height of the triangle.”

The length is 23 and y because you add them together

Iam not sure , but probably 750 or 7.5