Quadrilateral is the name fr a geometric figure with 4 sides.
A pentagon has 5 sides
Penatgons
A heptagon is a geometric figure with seven sides.
A square.
any geometric figure which has four sides
An octagon.
inscribed angles
A tangent perhaps?
A triangle is a geometric figure that is made of three line segments. It is a closed figure and has three angles.
A Triangle
Triangle