Distance Formula
d
x 2  x1 2  y 2  y1 2
Find the distance between
(2, 3) and (6, 6)
(-4, -4) and (2, 0)
Verify that the ∆ABC is a right triangle. Then find its area.
A = (-2, 5), B = (1, 3), and C = (-1, 0)
Midpoint Formula
 x  x 2 y1  y 2 
M 1
,

2 
 2
Find the midpoint of the segment joining
(2, 3) and (6, 6)
(-4, -4) and (2, 0)