1. Distance in Coordinate Geometry
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2. Chris is late for school and has quite the distance to go.X X

3. X Chris calls his dad Peter, who is watching TV.
After politely asking his son why he was running late and reiterating the importance of a good education, Peter agrees to help get him there. The only question… X
Or by Plane
By car

4. “As the crow flies” – the shortest distance between two points.
2.5 mi
Rise X
0.5 mi
2.55 mi = c
Run

5. AB = 14.4 Rise Run (9, 9) AB2 = ( )2 + ( )2 x2 – x1 y2 – y1 B (1, -3)

6. Distance from point A to B
AB2 = ( a )2 + ( b )2
x2 – x1
y2 – y1
Distance from point A to B
(1, 3) B
(-5, -5) A

7. Is the triangle GHI Scalene, Isosceles, or Equilateral??

8. Use the distance formula to write and equation for the circle.
(x, y)
(x, y) 2
( )2 3 2 3 3 3 r
(2, 3)
(2, 3)
(h, k)
Radius squared
Can we write the equation of a circle with center at (h,k) and radius r ?
Equation of a Circle

9. Equation of a Circle
(3, -2) 8

10. Given the equation of the circle, find the center of the circle and the length of the radius./
Equation of a Circle r
(h, k)
13^2 = 169
x – (-3)
(h, k) = (-3, 4)

11. Assignment:
Pg 510,