Final answer:
The distance formula in geometry is used to find the straight-line distance between two points in a coordinate plane.
Step-by-step explanation:
The subject of this question is Mathematics and the specific topic is Geometry. In geometry, the distance formula is used to find the straight-line distance between two points in a coordinate plane. The formula is derived from the Pythagorean theorem, which states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
The distance formula can be expressed as: d = √((x2 - x1)² + (y2 - y1)²)
Where (x1, y1) and (x2, y2) are the coordinates of the two points.