1-7: Midpoint and Distance in the Coordinate Plane

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1-7: Midpoint and Distance in the Coordinate Plane

Number Line Midpoint Formula Mean Average If you had test scores of 90 and 83, how would you find your average? Midpoint To find the midpoint of a segment on a number line. A B 90 83 Number Line Midpoint Formula On a number line, the coordinate of the midpoint of the segment with endpoints a and b is:

Midpoint in a Coordinate Plane B(6,8) (3.5,5.5) (6,3) Coordinate Plane Midpoint Formula In the coordinate plane, the midpoint of the segment with endpoints (x1, y1) and (x2, y2) is:

Ex. 1: Find the coordinates of the midpoint of Ex. 1: Find the coordinates of the midpoint of with the endpoints A (2, 3) and B (-5, 7). Ex. 2: The midpoint of has coordinates (3, 4). Point A has coordinates (-3, -2). Find the coordinates of B.

Distance To find the horizontal or vertical distance: B Apply same idea to finding distance on the Coordinate Plane: Distance formula based on Pythagorean Theorem: B A

Distance Formula The distance between two points and is: Ex. 3: Find the distance between each pair of points. a). (1, 2), (3, 4) b). (-1, -2), (-3, -4)

Homework: p. 54 #7-39 odd