Quadrilaterals – Math Geometry

“A two dimensional  4 lined closed polygon is known as Quadrilateral” .

The sum of interior angles of a quadrilateral is 360°.

Types of Quadrilaterals

Rectangular   –  Opposite sides are equal and parallel. Angle of each corner is 90°.

q2

Area of Rectangle = L x B

Perimeter of Rectangle = 2( L + B )

                                                             

Square  –  All four sides are equal. Angle of each corner is 90°.

q3

Area of square = L x L

Perimeter of square = 4 x L

Parallelogram – Opposite sides are equal  and parallel and  angles of opposite corners are same .

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To find area of a parallelogram always draw a perpendicular to base.

Area of Parallelogram =   B x  h

Perimeter of Parallelogram = 2(L + B)

Trapezoid

A quadrilateral  with following shape where L1  parallel to L2 is known as Trapezoid.

q5

Area of a trapezoid = ½ ( L1 + L2 ) x h

Perimeter of Trapezoid = Addition of all sides = L1 + L2 + M + M

                                                                                                                                          

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