Find the surface area o prisms and cylinders using nets.

Used with 3-D figures Is the sum of the areas of ALL its surfaces The total area of its net Units are squared Imagine wrapping a present, you cover all of the surfaces. This would also give you the surface area!

3-D figure Net

Find the surface area of the following prism: SA =2(8)5 + 2(8)4 + 2(5)4 SA = SA = 184 cm 2

Find the surface area of the following cylinder: SA = 2( п)3(6) + 2(п)3 2 SA = 36 п + 18п SA = 54 п units 2

Find the surface area of the following triangular prism: SA = 2(½)5(12) + ( )7 SA =60+ (30)7 SA = SA = 270 units 2

You can use a formula – Cubes & Rectangular Prisms: SA = 2lw + 2lh + 2wh Cylinders: SA = 2 пrh + 2(пr 2 ) Triangular Prisms: SA = 2(½bh) + (perimeter)h Perimeter is of one base face

Find the surface area of the following prism: SA = 2lw + 2lh + 2wh SA =2(7)2 + 2(7)4 + 2(2)4 SA = SA = 100 cm 2

Find the surface area of the following triangular prism: SA = 2(½bh) + (perimeter)h SA =2(½)7(15) + ( )15 SA = (56)15 SA = SA = 945 units 2

Odds p. 259 #5-25