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

If a:b = 3:4 and b:c = 5:6, what is a:c?

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The simple interest on Rs. 4000 at 5% per annum for 2 years is:

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What is the square root of 0.25?

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If sin(θ) = 0.6 and θ is acute, what is cos(θ)?

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A sum triples in 20 years at simple interest. What is the rate of interest per annum?

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The sum of the squares of two consecutive integers is 145. What are the integers?

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A sum of money doubles itself in 5 years at simple interest. What is the rate of interest?

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A square is inscribed in a circle with a radius of 5 cm. What is the area of the square?

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What is the slope of a line passing through the points (2, 3) and (4, 7)?

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

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