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Coordinate Geometry — Part 1: The distance formula

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Lesson

Coordinate Geometry, Part 1: How far apart?

In Chandigarh’s grid of sectors, how far is it from the school to the library — along the roads, and straight across?

In this lesson you will

  • Find the distance between two points using the distance formula
  • Find an unknown coordinate from a given distance
  • Test whether three points are collinear using distances
  • Classify triangles and quadrilaterals from their vertices
  • Find points equidistant from given points
  • straight line SL
  • along the roads
Along the roads: $4 + 3 = 7$ units. Straight across: only $5$ units.