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# What shape has four sides and three corners?

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There is no shape that has four sides and three corners. Two-dimensional shapes, known as polygons, have an equal number of sides and angles. In addition, none of the common three-dimensional shapes have four sides and three corners.

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A polygon with three corners is a triangle, which also has three sides. Four-sided polygons are known as quadrilaterals. Examples of quadrilaterals include the square, rectangle and parallelogram. Common three-dimensional shapes include the cube, triangular prism, cone, cylinder and tetrahedron. None of the shapes have three corners, or vertices. Some, such as the cylinder, have no corners. Others, such as the tetrahedron, have four vertices.

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## Related Questions

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Any shape that has four sides at right angles to each other with diagonals of equal length is a rectangle. The two special types of rectangles are squares and Fibonacci rectangles.

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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.

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The perimeter of a kite is the total distance around the outside of its shape, which means the length of all four of its sides added together. Since a kite has two pairs of matching sides, the standard formula is that the perimeter equals "2a" plus "2b."