Triangle Inequality Theorem
Presentation
•
Mathematics
•
8th Grade
•
Medium
Standards-aligned
Eric Rodriguez
Used 10+ times
FREE Resource
6 Slides • 12 Questions
1
Mr. Rodriguez
2
3+4>5, 3+5>4, 5+4>3
The sum of the shorter sides needs to be greater than the larger side.
3 + 4 < 9
3
1 + 2 = 3
Is not greater than 3
Cannot form a triangle
4
7, 13, 18
Forms a triangle
7 + 13 = 20
20 > 18
5
Multiple Choice
Determine if the 3 numbers can be measures of the sides of a triangle. 9, 8, 10
Yes
No
6
Multiple Choice
Determine if the 3 numbers can be measures of the sides of a triangle. 4, 16, 19
Yes
No
7
Multiple Choice
Determine if the 3 numbers can be measures of the sides of a triangle. 9, 11, 20
Yes
No
8
Multiple Choice
Determine if the 3 numbers can be measures of the sides of a triangle. 9, 15, 26
Yes
No
9
Multiple Choice
Determine if the 3 numbers can be measures of the sides of a triangle. 9, 12, 20
Yes
No
10
Multiple Choice
Determine if the 3 numbers can be measures of the sides of a triangle. 6, 14, 21
Yes
No
11
Multiple Select
Which of the following sets of side lengths could produce a triangle. SELECT ALL THAT APPLY.
4, 4, 4
5, 5, 10
3, 6, 9
5, 7, 11
13, 5, 6
12
Add the 2 numbers, Subtract the 2 numbers....the third side must be BETWEEN these 2 numbers (not equal to them!)
13
Open Ended
Name a possible length for the third side of a triangle with sides 4 and 7.
14
Open Ended
Name a possible length for the third side of a triangle with sides 11 and 19.
15
Multiple Select
Which of the following could be the third side of a triangle with sides 5.2 and 7.2? Check all that apply.
21
2
9
12.4
11
16
Multiple Select
Which of the following could NOT be the third side of a triangle with sides 35 and 14? Check all that apply.
21
48
26
35
14
17
Multiple Choice
If the measures of 2 sides of a triangle are 57 and 32, what is the LEAST possible measure of the third side if the measure is an integer?
25
26
88
89
18
Please work on the following IXL Skills
7.W.4
7.W.21
Some text here about the topic of discussion
Mr. Rodriguez
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