Distance formula: d=(x2−x1)2+(y2−y1)2d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Intros
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Lessons
  1. What is the Distance Formula? How to use it?
Examples
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Lessons
  1. Determine the distance between each pair of points.
    1. A(4,2)A(4, 2) & B(6,8)B(6 , 8)
    2. A(−2.5,−4)A(-2.5, -4) & (−8,4)(-8, 4)
  2. Determine the diameter of the circle with centre (−4,8)(-4,8) which passes through (5,−4)(5,-4).