1. Video
Set up a proportion.
Cross Multiply
X= 24

2. Video
Set up
Proportion
2. Cross multiply
3. If both sides equal, its similar
Answer: None of the above

3. Video
Read it carefully! It is asking for the coordinates of the original figure
8/4 = 2
Answer = (2,2)

4. Video 45
4, 1, 5, 8

5. Video
Use Triangle Sum Theorem – the sum of the interior angles = 180
180 – 90 – 40 = 50

6. Video
Rotation 90 degrees counter clockwise or 270 degrees clockwise.

7. If triangle ABC is reflected across the x-axis, what are the new coordinates of point A?
When reflecting across the x-axis the y-value changes signs.
Answer = A (1,3) – A’ (1, -3)

8. Translation
(x, y – 5)
Congruent
Video

9. Video
125

10. Video
12. Which of the angles in the figure above are supplementary to 6?
Answer: 5,8,1,4
125

11. Video
Use Exterior Angle Sum Theorem – the sum of the two remote interior angles = the exterior angle.
E + 51 = 108
108 – 51 = 57

12. Reflection across the y-axis

13. 15. If triangle ABC is reflected across the x-axis, what are the new coordinates of point C?
(8, -2) - Reflection over x-axis changes the sign of the y-coordinate

14. Use Exterior Angle Sum Theorem – The sum of the remote interior angles = the exterior angle.
= 120

15. Video 1
100
1012
y22 1
(-3)(-3) 1 9
127
42 + 1
16 + 1 17
1717
1550

16. Video
300
3.48 × 103
Video
1.4 × 104

17. Video
7.68 × 1011
2/10 = 1/5
Video
video
.09

18. 6 and -6
√ √81 1
10000

19. 9 6

20. 2 4 1

21. √121
√144
√225
√196
11 and 12
14 and 15

22. Video
12.7
5.3
9.7
7.7
8.6
4.3