Answer:
Figure A
Step-by-step explanation:
A regular polygon is the polygon which is all angles are equal in measure and all sides are equal in length.
So, from the figures given , Figure A shows that all the sides are of equal length, thus it can be a regular polygon.
Figure B, it is a quadrilateral in which two sides that are upper and lower seems to be of equal length but the right side and left have different same length, thus all the sides are not equal, hence it is not a regular polygon.
Figure C, It seems like a right triangle, in which the base has different length, the altitude has different length and the hypotenuse has different length, thus all the sides are not equal, hence this is not a regular polygon.
Figure D, it seems like a trapezium, in which all sides are not equal, hence it is also not a regular polygon.
