The internal angles of a rectangle add up to how many degrees?
Rectangle Rectangle In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°). It can also be defined as a parallelogram containing a right angle. A rectangle with four sides of equal length is a square. The term oblong is occasionally used to refer to a non-square rectangle. A rectangle with vertices "ABCD" would be denoted as . The word rectangle comes from the Latin "rectangulus", which is a combination of "rectus" (as an adjective, right, proper)
Rectangle rectangle is cyclic: all corners lie on a single circle. It is equiangular: all its corner angles are equal (each of 90 degrees). It is isogonal or vertex-transitive: all corners lie within the same symmetry orbit. It has two lines of reflectional symmetry and rotational symmetry of order 2 (through 180°). The dual polygon of a rectangle is a rhombus, as shown in the table below. The two diagonals are equal in length and bisect each other. Every quadrilateral with both these properties is a rectangle. A rectangle is rectilinear: its sides meet at right angles. A rectangle in the