A rectangular sheet of paper is 12 1/2 cm long and 10 2/3 cm wide. Find its perimeter.

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.

Calculate ∬y da where r is the region between the disks x^2+y^2 < =1 & x^2+(y-1)^2 < =1 show all work. (also explain why you split up the regions)

Parallelogram abcd has vertices a(8, 2), b(6, –4), and c(–5, –4). find the coordinates of d. !