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 = 4 and b = 5, what is the value of (a+b)^2?

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

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

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

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What is the sum of the first 50 positive integers?

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

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A car travels 240 km in 4 hours. What is its average speed?

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

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What is the square root of 121?

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What is the greatest common divisor (GCD) of 36 and 48?

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