1. Solve each problem before clicking on an answer.
Chapter 3 Practice
Solve each problem before clicking on an answer.

2. 1.) Find the value of the variable
Hint
3x-10
x+10 2x
x = 20
x = 30
x = 25
x = 40
x = 10

3. Correct!

4. 2.) Find the value of the variable
Hint 2w
4w – 12
w + 22
w = 22.7
w = 30
w = 36
w = 20
w = 34

5. Correct!

6. 3.) Find the value of the variable
Hint
132 M x
124
104
256
192
136
114

7. Correct!

8. 4.) Find the value of the variable
Hint h 34 38
34 72
108
74 40

9. Correct!

10. 5.) Find the value of the variablez
28
40
76 40 48 46
Hint 68 36

11. Correct!

12. 6.) Find the value of the variable41
68
20y
2.05 2 60 3
87
41
Hint

13. Correct!

14. 7.) Find the value of the variable. The pentagon is regular36 72 54 30 p
108
Hint

15. Correct!

16. 8.) Find the value of the variable if the polygon below is regular.
12x
Hint 10 12 60 5
120

17. Correct!

18. 9.) The interior angle sum of a convex polygon is 180 degrees more than twice the exterior angle sum. What polygon is this?
Hexagon
14-gon
Septagon
Decagon
Octagon
Hint

19. Correct!

20. 10.) Find the next number in the sequence: 10, 30, 20, 60, 50, 150, 140, ___
130
280
Hint
330
450
420

21. Correct!

22. 11.) Find the value of the variable
2w – 30 w
Hint 80 70 90 75

23. Correct!

24. 12.) Find the value of the variable if this is a regular hexagon.90 60 x 80
120
Hint

25. Congrats!
You are done. Please close this presentation.

26. Incorrect
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27. Hint #1 The three angles of a triangle have a sum of 180 degrees.
Back to Question #1

28. Hint #2
The exterior angle of a triangle is equal to the sum of the remote interior angles.
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29. Hint #3
Draw an auxiliary line through point M that is parallel to the other two lines.
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30. Hint #4
You could use corresponding angles of parallel lines to find the second angle of the triangle.
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31. Hint #5
Look for triangles for which you already know 2 angle measurements.
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32. Hint #6
We already know two of the angles in the bottom triangle, so we can find the third angle.
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33. Hint #7
Two of the angles of the triangle are exterior angles of the polygon.
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34. Hint #8
The sum of the interior angles of a polygon can be found using the formula 180(n-2) where n is the number of sides.
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35. Hint #9
Read the question and create an equation by translating the words into a math language.
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36. Hint #10
Find the first differences of the numbers in this list and look for a pattern.
Back to Question #10

37. Hint #11 Make the angles that are congruent x and y as shown: x y x
Back to Question #11 w
Then you can set up 2 equations.
One uses the three angles of the large triangle, and the other
uses the three angles of the smaller triangle.
Once you have the two equations it is possible to use systems
to eliminate both x’s and y’s.

38. Hint #12 Find the measure of each interior angle of the polygon.
Then find the base angles of the isosceles triangle formed.
Then subtract the base angle from the interior angle.
Back to Question #12