Topic Details (Notes format)

How to Use the Distance Formula (Coordinate Geometry)

Subject: Mathematics

Book: Maths Mastery

In a 2D coordinate plane, the distance between two points (x₁, y₁) and (x₂, y₂) is given by √[(x₂ – x₁)² + (y₂ – y₁)²]. For instance, the distance between (2, 3) and (6, 7) is √[(6 – 2)² + (7 – 3)²] = √(4² + 4²) = √32 = 4√2. Derived from the Pythagorean Theorem, the distance formula is pivotal in map reading, robotics pathfinding, or designing game environments. Familiarity with it ensures you can measure and compare positional relationships quickly and accurately in a variety of analytical tasks.

Practice Questions

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

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If the average of five consecutive odd numbers is 25, what is the largest number?

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A sum of money triples itself in 12 years at simple interest. What is the rate of interest per annum?

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

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What is the sum of the first 10 positive even numbers?

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A number is increased by 20% and then decreased by 20%. What is the net change?

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If the sum of the squares of two consecutive positive integers is 365, what are the integers?

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If 2x = 16, what is the value of x?

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If x = 2 and y = 3, what is the value of (x^2 + y^2)?

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If the radius of a circle is 7 cm, what is its circumference?

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