The formula for the area of the base is side squared so it would be A= 3 cm x 4 cm which equals 12 cm so the area for the base is 12 cm.
The formula for the area of one side of the pyramid would be 1/2 x b x h. So you would multiply 1/2 x 3 x 2.24 which equals 3.36. Since there are 4 side you would need to multiply 3.36 x 4 which equals 13.44.
So now all you need to do is add the base area and the side area, 13.44 and 12 cm, to get 25.44.
It's all pretty simple once you think about it. Hope you pass!
