Aim: How do we calculate the surface area of a cylinder?
So for surface area you'll basically need the formula of a rectangle + 2 times the formula for a circle. Which gives you the SA formula.
Surface ares: 2PI RH+2PIRsquared
MATH: Mental Abuse To Humans
Thursday 3 May 2012
Aim: How do we find the surface area and lateral area of pyramids & cones?
- The surface area is the outside of a solid. So here we'll be working with solids like pyramids & cones. They both have triangles.
- Pyramids have triangles as the lateral area and only one face
To find the surface area of a pyramid you must fist find the Lateral area.
L.A=1/2Pl
to find the sureface area you have to add the lateral area to the size of the base
S.A= L.A+B
To calculate the surface area of a cone
1/2Circumfrence times H plus Pi R squared
To calculate the surface area of a cone
1/2Circumfrence times H plus Pi R squared
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