1. Surface area of cuboids and prisms Grade C work

2. Find the area of these shapes.

3. Surface area is the sum of the areas of all the faces!

4. Method 1 12+12+18+18+2 4+24 = 108cm 2

5. Method 2 Top and bottom = 24cm 2 Left and right = 18cm 2 Front and back = 12cm 2 2x24 + 2x18 + 2x12 = 108cm 2

6. Find the surface area of these

7. Prisms

9. Q uestions: 1.How do we find the area of a triangle? 2.The surface area is the _ _ _ of the areas of all the _ _ _ _ _. 3.How many faces does a cuboid have? 4.What is the surface area of a 5cm cube?