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- d=\sqrt { { ({ x }_{ 2 }-{ x }_{ 1 }) }^{ 2 }+{ ({ y }_{ 2 }-{ y }_{ 1 }) }^{ 2 } }
- Application: Find the distance between two points on a coordinate plane
- The shareable video below provides a good explanation on the derivation of the distance formula using the Pythagorean Theorem and the distance between two points on a number line