**Definition of Quadrangle**

- A quadrangle is a polygon with four sides and four angles.

**More about Quadrangle**

- Quad means 4.
- All the quadrilaterals (such as parallelogram, rectangle, square, trapezoid, etc.) are quadrangles.
- A quadrangle can be either convex or concave.

**Examples of Quadrangle**

- The above figures are the examples of convex quadrangles.

- The above figures are the examples of concave quadrangles.

**Solved Example on Quadrangle**

Which of the figures is a concave quadrangle?

Choices:

A. Figure 1

B. Figure 2

C. Figure 3

D. Figure 4

Correct Answer: C

Solution:

Step 1:A concave quadrangle is a four-sided polygon in which a rubber band does not fit and leaves some gap.

Step 2:Figure 3 is a concave quadrangle as it has four sides and a rubber band could not fit around it.

Step 3:So, Figure 3 is a concave quadrangle.

**Related Terms for Quadrangle**

- Angle
- Concave Polygon
- Convex Polygon
- Four
- Parallelogram
- Polygon
- Quadrilateral
- Rectangle
- Rhombus
- Side
- Square
- Trapezoid