Question

In the net of a rectangular prism, each square of the grid is 1 square centimeter. What is the surface area of the prism? http://media01.owotw.com/g_mat06_2011/8/img_prism_net_d.gif
144 cm2
172 cm2
72 cm2
60 cm2

Answer 1

just count all the little squares overall.... that's will give you the surface area.

or you can do a shortcut by finding the area of the red, purple, and green rectangles , add them up and multiply by 2. that should give you the same answer if you counted each little square one by one