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Triangle Inequality Theorem
Transcript of Triangle Inequality Theorem
Scalene Triangle- No sides are congruent
Isosceles Triangle- 2 sides are congruent
*In terms of isosceles triangles*
Legs- Congruent sides
Base- Third side What is the Triangle Inequality Theorem? Example Problem Example Check whether it is possible to have a triangle with the given side lengths. Example Check whether the given side lengths form a triangle Example Problem 2 Triangle Inequality Theorem 7,9,13 * Add any 2 sides and see if it is greater than the other side* The sum of 7 and 9 is 16 and 16 is greater than 13.
The sum of 9 and 13 is 21 and 21 is greater than 7.
The sum of 7 and 13 is 20 and 20 is greater than 9.
This set of side lengths not satisfies Triangle Inequality Theorem.
These lengths do form a triangle. 4,8,15 Check whether the sides satisfy the Triangle Inequality Theorem Add any two sides and see if it is greater than the other side
The sum of 4 and 8 is 12 and 12 is less than 15
This set of side lengths doesn't satisfy Triangle Inequality Theorem These lengths don't form a triangle. 5 6 7 Side 1-5
Side 3-7 1+2>3
1+3>2 Triangle Inequality Theorem is... Does it work? Answer:
5+7>6 Yes, it follows the triangle inequality theorem 4 8 Side 1-4
Side 3-2 Triangle Inequality Theorem 1+2>3
1+3>2 Does it work? Answer 4+8>2
2+4>8 X No. These measurements don't follow the Triangle Inequality Theorem. All information was gathered off of Google.