A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted △ A B C {\displaystyle \triangle ABC}

a rectangle is a quadrilateral with four right angles. It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°)

A hexagon is a six-sided polygon or 6-gon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.

A pentagon is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°

A convex quadrilateral with at least one pair of parallel sides is referred to as a trapezium in English outside North America, but as a trapezoid.

An oval (from Latin ovum, "egg") is a closed curve in a plane which resembles the outline of an egg.

A pentagram (sometimes known as a pentalpha, pentangle, pentacle, or star pentagon) is the shape of a five-pointed star polygon.

A regular heptagon, in which all sides and all angles are equal, has internal angles of 5π/7 radians (1284⁄7 degrees).

A square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or 100-gradian angles or right angles).

An octagon is an eight-sided polygon or 8-gon.

A rhombus (plural rhombi or rhombuses) is a quadrilateral whose four sides all have the same length.

Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length. The rhombus is often called a diamond

a dodecagon or 12-gon is any twelve-sided polygon.