Upload
others
View
1
Download
0
Embed Size (px)
Citation preview
Geo 55 Lesson with notes 4th b.notebook
1
January 15, 2016
Dec 3012:04 PM
55 The Triangle Inequality
Learning Targets:I can use the Triangle Inequality Theorem to identify possible trianglesI can prove triangle relationships using the Triangle Inequality Theorem
What are the lengths of the three scraps from each attempt?
What is the sum of the two shorter lengths for each attempt?
How does the sum compare to the third scrap in each attempt?
Use this information to make a conjecture about the relationships between the two shorter sides and the third side of a triangle.
Jan 151:37 PM
Geo 55 Lesson with notes 4th b.notebook
2
January 15, 2016
Dec 3012:09 PM
To show that three lengths will not make a triangle, just show that one of the inequalities is not true.
Dec 3012:11 PM
Geo 55 Lesson with notes 4th b.notebook
3
January 15, 2016
Dec 3012:48 PM
Example 1:
Is it possible to form a triangle with the given side lengths? If not, explain why not.
1. 6 1/2, 6 1/2, 14 1/2 2. 6.8, 7.2, 5.1
3. 15 yd, 16 yd, 30 yd 4. 2 ft, 8 ft, 11 ft
Dec 3012:50 PM
When given only 2 lengths for a triangle, use the inequality theorem to set up inequalities to solve possible third side lengths.
Geo 55 Lesson with notes 4th b.notebook
4
January 15, 2016
Dec 3012:56 PM
Example 2:
5. In ΔPQR, PQ = 7.2 and QR = 5.2. Which measure cannot be PR?a. 7 b. 9 c. 11 d. 13
6. Which of the following could not be the value of n?f. 7 g. 10 h. 13 j. 22
Dec 301:02 PM
Geo 55 Lesson with notes 4th b.notebook
5
January 15, 2016
Dec 301:10 PM
Jan 152:09 PM
Geo 55 Lesson with notes 4th b.notebook
6
January 15, 2016
Aug 193:02 PM