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Geometry · G-GMD

Surface Area of 3-D Solids

Surface area is the total area of all faces. Cube SA = 6s²; rectangular prism SA = 2(lw+lh+wh); cylinder SA = 2πr² + 2πrh.

GeometryCommon Core HSG-GMD.A.3G-GMDVerified correct ✓

Worked examples

Find the total surface area of a cylinder with radius 6 and height 11. Use π ≈ 3.14159. Round to 4 decimal places.
Answer: 640.885
Find the total surface area of a square pyramid with base side 8 and height 6. Use π ≈ 3.14159. Round to 4 decimal places.
Answer: 179.378

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