Topic Details (Notes format)

How to Calculate the Area of a Rectangle

Subject: Mathematics

Book: Maths Mastery

Rectangles form the basis of countless geometric and real-life applications, from plotting out rooms to determining the surface area of rectangular objects. The area formula is A = length × width. For example, a 12 m by 8 m rectangle has an area of 96 m². This simple calculation underlies more complex designs, such as floor plans or packaging materials. Grasping rectangular area helps you swiftly compute how much paint to buy for a wall or how large a garden bed is, making it indispensable in practical problem-solving.

Practice Questions

If a+b = 10 and ab = 21, what is the value of a^3 + b^3?

If a number is divisible by 9, it is also divisible by which of the following?

The base of a triangle is 10 cm and its height is 6 cm. What is its area?

If a cone has a radius of 5 cm and a height of 12 cm, what is its slant height?

A cone has a base radius of 7 cm and height of 24 cm. What is its volume?

The angles of a quadrilateral are in the ratio 3:4:5:6. What is the largest angle?

If 2x - 3 = 7, what is the value of x?

If the radius of a circle is doubled, what happens to its area?

If the angles of a triangle are in the ratio 2:3:4, what is the measure of the largest angle?

If the sides of a triangle are 6 cm, 8 cm, and 10 cm, what is the area of the triangle?