Calculate the distance between two points using the distance formula √((x₂−x₁)² + (y₂−y₁)²). Shows step-by-step working with coordinate geometry.
The distance formula calculates the straight-line (Euclidean) distance between two points in a coordinate plane using d = √((x₂−x₁)² + (y₂−y₁)²), derived from the Pythagorean theorem.
Distance
5
Steps
Δx = 4 − 1 = 3
Δy = 6 − 2 = 4
d = √(3² + 4²) = √(9 + 16) = √25
d = 5
Formula
d = √((x₂ − x₁)² + (y₂ − y₁)²)d = Distance between the two points
(x₁, y₁) = Coordinates of the first point
(x₂, y₂) = Coordinates of the second point
Worked Example
Distance from (1, 2) to (4, 6)
Did you know? The distance formula is a special case of the Euclidean metric named after the Greek mathematician Euclid (~300 BC), whose work 'Elements' remained the standard geometry textbook for over 2,000 years (source: Mathematical Association of America).
Sources
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