1.9_Distance and Midpoint Formulas - Section 1.9 Distance and Midpoint Formulas Circles The Distance Formula y Find the Distance between-4,2 and(3-7 x 2

1.9_Distance and Midpoint Formulas - Section 1.9 Distance...

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Section 1.9 Distance and Midpoint Formulas; Circles
The Distance Formula
Example Find the distance between (4,-5) and (9,-2).
The Midpoint Formula
Find the midpoint of the segment whose endpoint are (-1,5) and (6,8). 1 6 5 8 , 2 2 5 13 , 2 2       y (-1,5) (6,8)
Example Find the midpoint of the segment whose endpoints are (-1,7) and (-5,9).
Circles
2 2 2 2 2 To Graph a Circle; First Solve the equation for y: x 4 y 4-x y = 4 Graph as t y x 2 2 1 2 wo separate equations y = 4 y = 4 So that the circle doesn't look flattened, press ZOOM, #5 for ZSquare. Now press GRAPH. x x Graphing Calculator

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