Page 2 - LN 2D shapes

Quadrilateral

A quadrilateral is a polygon having four sides, four angles, and four vertices. The sum of all
interior angles is 360°.Quadrilaterals can be classified into Parallelogram, Square, Rectangle,
and Rhombus.

Square

A square is a four-sided polygon (2d Shape), whose four sides are equal in length and all the
angles are equal to 90°. It is considered to be a two-dimensional regular quadrilateral. The
diagonals of the square also bisect each other at 90°. A wall or a table where all the sides
are equal are the examples of square shape.

Rectangle

A rectangle is a 2d shape which has four sides, where the opposite sides are equal and
parallel to each other. All the angles of a rectangle are equal to 90°. A brick, TV, cardboard,
which has length and breadth are examples of the rectangle.

Pentagon

A pentagon is a five-sided polygon (2d Shape), and it can be regular or irregular. In the case
of a regular pentagon, each interior angle is equal to 108°, and each exterior angle measures
72°. It has five diagonals. The Pentagon building, which is the headquarters of the US
Department of Defence, is a great example of the pentagon shape.