Theorems
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(Difference between revisions)
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\sqrt{(\ -11)^2 + (+5)^2} = | \sqrt{(\ -11)^2 + (+5)^2} = | ||
- | \sqrt{ | + | \sqrt{\ 121 + 25} = \sqrt{146}</math> |
- | [[Media:Distance_&_Midpoint-9-2_ME.pdf|Distance & Midpoint 9-2 ME Worksheet]] | + | Try some distance problems at [[Media:Distance_&_Midpoint-9-2_ME.pdf|Distance & Midpoint 9-2 ME Worksheet]] |
==Sum of the Sides of a Triangle== | ==Sum of the Sides of a Triangle== |
Revision as of 22:54, 18 October 2009
The Distance Formula
Example: Find the distance between point A(5,-7) and B(-6,-2) and leave your answer in radical form.
Solution: Let A be point 1 and B be point 2. We have
Substituting we have
Try some distance problems at Distance & Midpoint 9-2 ME Worksheet
Sum of the Sides of a Triangle
Thm: The sum of two sides of any triangle must be greater than the third side
Example: Given two sides of a triangle are 8 inches and 11 inches, find all the possible lengths of the third side (also known as S3)
Solution: We know that 8 + 11 must be greater than S_3