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# How many edges does a hexagonal prism have?

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### Quick Answer

A hexagonal prism always has 18 edges. There are six edges around the top and bottom hexagon faces, equaling 12 edges, and another six where the faces are connected on the sides, for a total of 18 edges.

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### Full Answer

A hexagonal prism is the basic three-dimensional representation of a hexagon, which is a two-dimensional polygon with six sides. The prism consists of two hexagons that are parallel to each other, which may or may not be the same size. They are connected with straight lines from a vertex on one hexagon to a vertex on the other. The connecting lines form quadrilaterals on the sides, either squares or rectangles. In total, a hexagonal prism has eight faces, with six quadrilateral faces and two hexagon faces. Additionally, a hexagonal prism also has 12 vertices, six located at each vertex of each hexagon face.

A prism can be regular or irregular, depending on the shape of the two-base polygons. In the case of a hexagonal prism, it is only a regular hexagonal prism if the two hexagons are the exact same, and each hexagon is comprised of six equal sides. Any shape where the two-base polygons consist of varying side lengths is an irregular shape.

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A triangular prism has five faces, six vertices and nine edges. The face is the flat side of a solid figure, and it is typically in the form of a plane figure such as a rectangle, square or triangle, with the triangular prism having two triangular bases and three rectangular sides. Another type of prism is the rectangular prism, which has six rectangular faces, 12 vertices and eight edges.

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A trapezoidal prism is a three-dimensional figure that consists of two trapezoids on opposite faces connected by four rectangles. A trapezoidal prism has six faces, eight vertices and 12 edges.

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