Surface area …cont’dSquare/Kansakar

iwbat Find surface area of 3d Solids in more than one way

Do now

What is the circumference of each circle? (in terms of pi)

4cm 11cm

6cm5cm

Try this

What is the AREA of each circle? (in terms of pi)

4cm 11cm

6cm5cm

ThinkSee if you can break the formulas for surface area into parts.

What part represents the area of the base(s)?

What part represents the lateral surface area?

What does B and P represent? Why do you think the use B and P?