A four-sided polygon is called a quadrilateral. "Quad" means four and "lateral" means side, so quadrilateral truly means four sides. The internal angles in a quadrilateral add up to 360 degrees. More »

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A four-sided polygon is known as a quadrilateral. There are various types of quadrilaterals, but the most recognized are the square, rectangle, rhombus, trapezoid and the parallelogram. Quadrilaterals are always flat sha... More »

A 12-sided two-dimensional polygon is called a dodecagon. A regular dodecagon has 12 sides that are all the exact same length and internal angles that are 150 degrees each. Since there are 12 internal angles, the total i... More »

A polygon with four sides and four angles is called a quadrilateral. Quadrilaterals are two-dimensional, closed shapes with angle measurements that add up to 360 degrees. More »

A diagonal is a line between two vertices of a polygon that is also not a side of the polygon, and a quadrilateral is a four-sided polygon. Veritces are the points where sides of a polygon meet, and a polygon is an enclo... More »

A four-sided polygon is known as a quadrilateral. There are various types of quadrilaterals, but the most recognized are the square, rectangle, rhombus, trapezoid and the parallelogram. Quadrilaterals are always flat sha... More »

A quadrilateral is any two-dimensional shape or polygon that has four straight sides. A quadrilateral can also be called a quadrangle or a tetragon. More »

www.reference.com Math Geometry Shapes