Surface Area

Yesterday, we started to determine the surface area of prisms. The kids caught on so fast!! To determine surface area of a prism, we find the area of each face (side) of the prism and then add all of the areas together. The formula that we will see on our reference sheet is SA= 2bh + 2bw + 2hw. We have been working hard and here is the chart we created together:

Here shows why we multiply each formula (bh, bw, hw) by 2