A 12-sided shape is called a dodecagon. A dodecagon is a type of polygon, which is a two-dimensional shape comprised of straight lines. These lines connect to each other to form a closed shape.
Continue ReadingThe name dodecagon is derived from the Greek words meaning "twelve" (dodeca) and "angles" (gon). Polygons are considered regular polygons if all of their sides and angles are equal. A regular dodecagon has interior angles of 150 degrees. It is also considered a convex dodecagon because none of its interior angles are greater than 180 degrees. Irregular dodecagons have unequal angles and sides. If one of the interior angles is greater than 180 degrees, then it is also a concave dodecagon.
Learn more about GeometryTriangles have been used extensively throughout history in construction due to their rigid shape and strength. Unlike a square, that can shift into a parallelogram when force is applied to one of its sides, an equilateral triangle's sides and angles are fixed.
Full Answer >The cubic feet formula depends on the shape of the object for which one is calculating volume, but for a cube, v=a^3, where a is the length of one side in feet. For cylinders and prisms, the formula is the area of the base multiplied by the height.
Full Answer >A protractor is an inexpensive math tool used to measure the sharpness of an angle in a geometric shape. Reading a protractor is fairly simple.
Full Answer >In geometry, a line of symmetry is a line that divides a shape into two halves that match exactly, as if reflected in a mirror. Line symmetry is sometimes called reflective symmetry because each point on one side of the line is reflected by a corresponding point on the other.
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