Surface Area:



Surface Area:

Surface Area (SA) – of a solid figure is the sum of the areas of all its surfaces, or faces.

Lateral Area (LA) – of a solid figure does not include the base or bases.

To Find the Surface Area of a Figure:

1) Describe the size and shape of the figure.

2) Find the area of each face.

3) Find the sum of the areas.

There are some figures that we can use a formula to calculate the surface area:

Surface Area of a Right Prism: SA = 2(lw + lh + hw)

Surface Area of a Cube: SA = 6e2

Surface Area of a Rectangular Right Pyramid: SA = ½ Pl + B

Surface Area of a Right Circular Cylinder: SA = 2πrh + 2πr2

Surface Area f a Right Circular Cone: SA = ½ Cl + B

Surface Area of a Sphere: SA = 4πr2

Do Now: complete questions p. 274 – 275 I workbook on surface area.

Volume:

Volume (V) – amount of space enclosed by a 3-D figure.

- measured in cubic units (units3).

We have already reviewed the different formulas for volume on our formula sheet from September.

Volume of a Rectangular Solid: V = lwh

Volume of a Cylinder: V = πr2h

Volume of a Cube: V = s3

Volume of a Cone: V = 1/3 πr2h

Volume of a Sphere: V = 4/3 πr3

Do Now: complete questions p. 274 – 275 I workbook on volume.

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