90° (for square and rectangle) in euclidean plane geometry, a quadrilateral is a polygon with 4 edges (or aspects) and four vertices or corners. on occasion, the time period quadrangle is used, by analogy with triangle, and on occasion tetragon for consistency with pentagon (five-sided), hexagon (6-sided) and so on.
What are the different shapes in geometry?
The principal geometric plane shapes are:
The Circle.
The Triangle.
The Rectangle.
The Rhombus.
The Square.
The Trapezoid.