Question

1. which of these figures is not a quadrilateral?

a
b
c
d
d
a
c
b

Explanation:

Step1: Define quadrilateral

A quadrilateral is a 4-sided polygon with straight sides.

Step2: Analyze each figure

• Figure B: 4 straight sides, quadrilateral.
• Figure C: 4 straight sides, quadrilateral.
• Figure D: 4 straight sides, quadrilateral.
• Figure A: Has rounded (curved) edges, not straight-sided, so it is not a quadrilateral.

Answer:

A. The first blue figure (rounded corners)