Angle
Geometry shape formed by two rays (initial and ending sides of the angle) that share a common endpoint called the vertex. You may name an angle using the vertex, or a point in each ray and the vertex label in the center.

Isosceles trapezoid
Trapezoid with two non-congruent and non-parallel sides.

Kite
Parallelogram with two pairs of adjacent sides congruent and without opposite sides congruent.

Parallelogram
Any quadrilateral with two pairs of opposite sides parallel.

Polygon
It is a closed plane figure with a least three straight segments as sides.

Quadrilateral
A four-sided polygon.

Rectangle
Any parallelogram that has 4 right angles.

Rhombus
Any parallelogram with 4 congruent sides.

Square
Parallelogram with four congruent sides and four congruent angles.

Trapezoid
Quadrilateral with exactly one pair of parallel sides.