Regular Polygons
A Regular Polygon has
all side equal
all angles equal
Examples :
In ∆ ABC
AB = AC = BC
and ∠A = ∠B = ∠ C
Irregular polygons
A Polygon which is not a regular Polygon is an irregular polygon.
Examples :
Δ ABC is a right angle triangle,
where ∠A ≠ ∠B ≠ ∠C
and AB ≠ BC ≠ AC.
∴ Δ ABC is a regular polygon
ABCD is a square in which
AB = BC = CD = DA
and ∠A = ∠B = ∠C = ∠D
∴ ABCD is a regular Polygon
∴ Δ ABC is not a regular polygon
ABCD is a rectangle,
In a rectangle, all angles are 90°
⇒ ∠A = ∠B = ∠C = ∠D
And opposite sides are equal
∴ AB = CD and AD = BC
But, AB ≠ BC ≠ CD ≠ AD.
i.e. All sides are not equal
∴ ABCD is not a regular Polygon

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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