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 3x = 81, what is the value of x?

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

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What is the sum of all odd numbers from 1 to 99?

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If the sum of three consecutive integers is 72, what are the integers?

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

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If a = 5 and b = 12, what is the length of the hypotenuse of a right triangle?

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

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A number is increased by 20% and then decreased by 10%. What is the net change?

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If the sum of the angles of a polygon is 1080°, how many sides does the polygon have?

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If a:b = 5:7 and b:c = 6:11, what is a:c?

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