Quick please

Explain how to use a coordinate plane to find the area of
a rectangle with vertices (-4, 9).(-4,-3), (-1, -3), and
(-1,9). What is the area?

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

other answer is correct. i had used the radius of the radius somehow. a website:

i think the length is 12 and the width is 17