If each angle of a rhombus is right angle, then rhombus is a

In a polygon, if these exist even one line, which when joining two points of a polygon, does not lie inside the polygon completely, then that polygon is a

A polygon with 7 sides are called.

Find the number of sides of a regular polygon whose each exterior angles has a measure of 60^o.

Sum of angles of a decagon is.

Sum of angles of a quadrilateral =

A decagon has ____ diagonals.

Which of the following is a convex polygon.

A regular quadrilateral is known as

Sum of exterior angles of a decagon is