Question

Which of the following are regular polygons? Give reasons.

(a) A triangle

(b) A rectangle

(c) An eqilateral triangle

(d) A square

Answer 1

(a) A triangle can't be a regular polygon, since all sides are not always equal.

(b)A rectangle is not a regular polygon, since its all 4 sides are not equal.

(c)An equilteral triangle is a regular polygon, as its all three sides and three angles are equal.

(d) A square is a regular polygon, as its all four sides and four angles are equal.