2. 3-3 parallel Lines and the triangle sum theorem

3. Finding Angle Measures in Triangles
What kind of triangle is this?
ACUTE
What happens when you move all three angles together?
180o 2 3 1 3 2

4. Finding Angle Measures in Triangles
What kind of triangle is this?
RIGHT
What happens when you move all three angles together?
180o 3 2 1 3 2

5. Finding Angle Measures in Triangles
What kind of triangle is this?
Obtuse
What happens when you move all three angles together?
180o 2 3 1 2 3

13. Be sure to ask if you miss one and don’t know why!
3-5 Quiz
Use the following questions to assess yourself and see how well you understand today’s lesson.
Be sure to ask if you miss one and don’t know why!
Remember to record your score on your portfolio sheet.

14. 1. Find the value of k. The diagram is not to scale.17 73
118
107
Non-Response Grid

15. 2. Find the value of x. The diagram is not to scale.33
162
147 75
Non-Response Grid

16. 3. A triangular playground has angles with measures in the ratio 8 : 6 : 4. What is the measure of the smallest angle? 30 40 5 20
Non-Response Grid

17. 4. The folding chair has different settings that change the angles formed by its parts. Suppose m2 is 26 and m3 is 70. Find m1 . The diagram is not to scale. 96
106
116 86
Non-Response Grid

18. 5. Find the value of the variable. The diagram is not to scale.66 19 29 43
Non-Response Grid

19. Assignment
3-5 p #10-34 even You will need your compass tomorrow!!