Area | Quantitative Aptitude Formula

	Area of a rectangle = (Length × Breadth).

	Perimeter of a rectangle = 2(Length + Breadth).

	Area of a square = (side)² = 1 / 2 (diagonal)²

	Area of 4 walls of a room = 2 (Length + Breadth) × Height.

	Area of a triangle = 1 / 2 × Base × Height. I). Area of a triangle = √s(s-a)(s-b)(s-c) where a, b, c are the sides of the triangle and s = 1/ 2 (a + b + c) II). Area of parallelogram = (Base x Height). Area of a rhombus = 1 / 2 (Product of diagonals). III). Area of a trapezium =1 / 2 (sum of parallel sides) x distance between them. Iv). Area of a circle = ΠR², where R is the radius.

Area of a triangle = 1 / 2 × Base × Height.

I). Area of a triangle = √s(s-a)(s-b)(s-c) where a, b, c are the sides of the triangle and s = 1/ 2 (a + b + c)

II). Area of parallelogram = (Base x Height).

Area of a rhombus = 1 / 2 (Product of diagonals).

III). Area of a trapezium =1 / 2 (sum of parallel sides) x distance between them.

Iv). Area of a circle = ΠR², where R is the radius.

	Circumference of a circle = 2ΠR. I). Circumference of a semi-circle = ΠR. II). Area of semi-circle = ΠR² / 2.

	FUNDAMENTAL CONCEPTS

	Results on Triangles : 1. Sum of the angles of a triangle is 180°. 2. The sum of any two sides of a triangle is greater than the third side. 3. Pythagoras Theorem : In a right-angled triangle, (Hypotenuse)²=(Base)² + (Height)² 4. The line joining the mid-point of a side of a triangle to the positive vertex is called the median.