The surface area of a prism is the total area of all its faces. For example, a triangular prism has a triangular base, and a rectangular prism has a rectangular base. A prism is named based on the shape of its base. It can be either triangular, rectangular, or square in shape. The base is in the shape of a square, so A(base) = l².A prism is a three-dimensional (3D) geometric shape with straight, parallel sides. A = l × √(l² + 4 × h²) + l² where l is a base side, and h is a height of a pyramidĪ = A(base) + A(lateral) = A(base) + 4 × A(lateral face). The formula for the surface area of a pyramid is: That's the option that we used as a pyramid in this surface area calculator. Regular means that it has a regular polygon base and is a right pyramid (apex directly above the centroid of its base), and square – means that it has this shape as a base. But depending on the shape of the base, it could also be a hexagonal pyramid or a rectangular pyramid one. When you hear a pyramid, it's usually assumed to be a regular square pyramid.
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