Identify the sides and find perimeter of a quadrilateral

Identify the sides and find perimeter of a quadrilateral

Perimeter

The perimeter is the sum of all sides of a closed figure.

EXAMPLES

Finding the sides and perimeter of the following figures.

Sides = AB, BC, CD, DA

Perimeter = AB + BC + CD + DA

 = 3 + 6 + 8 + 2 = 19

Perimeter= 19cm

In a given square all the sides are equal.

Therefore, Perimeter of a square = PQ + QS + SR + RP

= 8 + 8 + 8 + 8 = 32

Perimeter of a square = 32cm

In a given rectangle opposite sides are equal.

Perimeter = LM + MN + NO + OP

= 9 + 3 + 9 + 3 = 24

Perimeter = 24cm

Perimeter = XY + YZ + ZX

= 7 + 7 + 7 = 21

Perimeter = 21cm

Activity: Find the Perimeter of Table, Desk, Black board and Door in your class room.