Math's: Meaning of Perimeter and Area: Perimeter and Area of Some Quadrilaterals

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Meaning of Perimeter and Area

  • The total length of the boundary of a closed plane figure is called its Perimeter. The perimeter is measured in some linear units such as , etc.

  • The measure of the region enclosed by a plane figure is known as Area. Area is measured in square units such as , etc.

Perimeter and Area

Perimeter and Area

Formula for Perimeter and Area of Some Specific Quadrilaterals and Triangles

Square- Perimeter

;

Area:

Sqaure Area

Sqaure Area

Rectangle- Perimeter

;

Area:

Rectangle Area

Rectangle Area

Parallelogram- Area

Parallelogram Area

Parallelogram Area

Rhombus- Area

Rhombus Area

Rhombus Area

Trapezium- Area

Trapezium Area

Trapezium Area

Triangle- Area

Triangle Area

Triangle Area

When altitude or height is given, then,

When altitude or height is not given then, where represents the semi perimeter and .

Triangle Area

Triangle Area

Circle- Perimeter or Circumference

;

Area: where and represents the radius of the circle

Perimeter of Circumference

Perimeter of Circumference

Sector- Perimeter

Area: where is the angle of the sector

Sector Perimeter

Sector Perimeter

Ring or Circular Path- Perimeter

Area:

where is the radius of the larger circle and is the radius of the smaller circle.

Ring or Circular Path- Perimeter

Ring or Circular Path- Perimeter

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