A quadrangle is a polygon with four sides and four angles.
Quad means 4
All the quadrilaterals (such as parallelogram, rectangle, square, trapezoid, etc.) are quadrangles.
A quadrangle can be either convex or concave.
The above figures are the examples of convex quadrangles.
A. Figure 1
B. Figure 2
C. Figure 3
D. Figure 4
Correct Answer: C
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.