A dodecagon is a two-dimensional shape with 12 sides. A regular-shaped dodecagon has all its sides with the same length, and all internal angles are the same size. An irregular-shaped dodecagon has sides and angles of different sizes.
Know MoreA dodecagon also has 12 vertices and 12 internal angles at each one of those vertices. The internal angle in a regular dodecagon is 150 degrees, making the total sum of angles 1,800 degrees. Many historic buildings have been built in the shape of a dodecagon, including the Vera Cruz church in Segovia, Spain, and the Torre del Oro, a 13th century military watchtower in Seville, Spain.
Learn MoreA right circular cone's surface area is made up of two parts: the top part with the slanted sides and the circular base. The total surface area is found by finding the surface area of each part and adding them together.
Full Answer >You can calculate the perimeter of any object by adding the length of its sides. With a few simple measurements, you can quickly find the perimeter of a triangle.
Full Answer >There are four triangular faces on a tetrahedron. A face describes an individual surface on an object. On the tetrahedron, people can only see three of the four faces.
Full Answer >In geometry, a shape with five sides is called a pentagon. A regular pentagon has five sides of equal length, as well as five equal angles. A standard "STOP" sign in the US is a regular pentagon, as is the Pentagon building in the District of Columbia.
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