1. The surface area of a composite 3D figure is the sum of the surface areas of all the individual 3D shapes that make up the composite figure.
2. To find the surface area of a composite 3D figure, calculate the surface area of each individual shape and then add them together.
3. The formula to calculate the surface area of a cube is Side x Side x 6, where Side is the length of one side of the cube.
4. The formula to calculate the surface area of a rectangular prism is 2lw + 2lh + 2wh, where l, w, and h are the length, width, and height of the prism.
5. The surface area of a composite 3D figure can be found by breaking down the figure into simpler shapes, calculating the surface area of each individual shape, and then adding them together.
6. Remember to pay attention to any shared faces or edges between the individual shapes when calculating the total surface area of a composite figure.
7. Double-check your calculations to ensure accuracy, as surface area is an important measurement that can affect the overall appearance and function of a 3D figure.
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