A polygon has 4 sides. The lengths of the sides are 4cm, 4cm, 4cm and 5cm. This is a regular polygon.
This is an irregular polygon as all its sides are not equal.
A polygon has 4 sides and length of the sides are 4 cm, 4 cm, 4 cm and 5 cm. This polygon is regular.
A triangle of sides 9 cm, 5 cm and 4 cm can be constructed.
Draw a triangle with two sides equal to 4 cm and 5 cm and the angle between them is 60∘. Then the circumcentre of this triangle lies inside the triangle.
It is possible to draw a unique parallelogram with side lengths 4 cm and 9 cm.