Vocabulary: The surface area of a three-dimensional figure is the sum of the areas of its surfaces.
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Surface Area of Rectangular Prism
- How many faces are there?
- What shapes are the faces?
- Are any of the faces the same?
How do we find the surface area?
- Area = the sum of the sides
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[expand title=”Triangular Prisms”]
Surface Area of Triangular Prism
- How many faces are there?
- What shapes are the faces?
- How many of each shape are there?
How do we find the surface area?
- Find the area of the faces and add them together!
- Triangles:
- Rectangles:
- Total Surface Area (SA) = 144
- Area = 2 x triangular faces + area of each rectangular face
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[expand title=”Cylinders”]
Surface Area of Cylinder
- How many faces are there?
- What shapes are the faces?
- Are any of the faces the same?
How do we find the surface area?
- Area = Area of the side + Area of the base + Area of the top
- A =
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Assignment: Surface Area of Prisms and Cylinders