Pearson Geometry Common Core, 2011
PG
Pearson Geometry Common Core, 2011 View details
7. Midpoint and Distance in the Coordinate Plane
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Exercise 26 Page 54

Use the Distance Formula.

≈ 23.5 units

Practice makes perfect
To determine the distance between two points, we use the Distance Formula. The coordinates of the given points are C(12,6) and D(-8,18).
CD = sqrt((x_2-x_1)^2 + (y_2-y_1)^2)
CD=sqrt(( -8- 12)^2+( 18- 6)^2)
CD=sqrt((-20)^2+12^2)
CD=sqrt(400+144)
CD=sqrt(544)
CD= 23.537204...
CD≈23.5
The distance between C and D is approximately 23.5 units.