Q:
# What are triangular-based pyramids?

**A triangular-based pyramid is a convex solid figure with a base in the shape of a triangle and triangular sides that meet at points called vertices, according to New South Wales Board of Studies.** Convex means that all its interior angles are less than or equal to 180 degrees.

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Peter
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A triangular-based pyramid has exactly four faces, any of which can serve as the pyramid’s base. It also has six edges and four vertices. Other common pyramids include square-based pyramids and hexagonal-based pyramids. To find the surface area of a pyramid, add the areas of all its faces. To determine its volume, multiply the base times the perpendicular height, then divide the resulting product by three.

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