Showing posts with label radius. Show all posts
Showing posts with label radius. Show all posts

Wednesday, June 26, 2013

Distance and Midpoint Formulas

In this section we will review the distance and midpoint formulas.
Notice that the distance formula results in a real number and that the midpoint formula results in an ordered pair.

[ Interactive: Distance and Midpoint ]

Given two points find the distance and midpoint between them.

Video Lessons:
Use the distance and/or midpoint formulas to solve the following.

Example: If the diameter of a circle is defined by the two points (-3, 4) and (7, 4), find the center and radius of the circle. (Hint: diameter = 2r)
Example: Find the area of a circle given center (-3, 3) and point (3, 3) on the circle.
Video Examples on YouTube:

YouTube Example: Find the coordinates of an endpoint given the other endpoint and the midpoint.

Friday, April 26, 2013

Interactive: Circles

Interactive Instructions: Move the green points C and P. You can also drag the circle around.

[ NOTESCircles ]