Question

what is quadrilateral​

Answer 1

Answer:

In Euclidean plane geometry, a quadrilateral is a polygon with four edges and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon and hexagon, or 4-gon for consistency with k-gons for arbitrary values of k.

Step-by-step explanation:

Area: ½ x diagonal x (sum of perpendicular heights)

Perimeter: sum of sides of the quadrilateral

Number of vertices: 4

Number of edges: 4

Internal angle: 90° (for square and rectangle)

Answer 2

A quadrilateral is a plane figure made with four line segments closing in a space. The easiest, fastest way to learn about quadrilaterals is to build one yourself.

Find four straight objects to use as line segments (four = quadr; side = lateral). Anything will do, and they do not have to be the same length: straws, rulers, dowels, pens -- whatever you have handy. If you connect the four linear objects at their eight ends, you have a quadrilateral, a four.