# Texas Go Math Grade 8 Module 12 Answer Key Transformations and Congruence

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## Texas Go Math Grade 8 Module 12 Answer Key Transformations and Congruence

Find each difference.

Question 1.
5 – (-9) ___________
5 – (-9) = 5 + 9 = 14 (To subtract an integer, add its opposite)

Question 2.
-6 – 8 ___________
(To subtract an integer, add itâ€™s opposite) -6 – 8 = – 6 + (- 8)
(The signs are the same negative, so the sum of integers is negative) = – 14

Texas Go Math Grade 8 Module 12 Answer Key Absolute Value Question 3.
2 – 9 ___________
(To subtract an integer, add itâ€™s opposite) 2 – 9 = 2 + (- 9)
(The signs are different, so find the difference of the absolute values: 9 – 2 = 7.) = |2| – |-9|
(Use the sign of the number with the greater absolute vaue) = -7

Question 4.
-10 – (-6) ___________
(To subtract an integer, add itâ€™s opposite.) -10 – (- 6) = -10 + 6
(The signs are different, so find the difference of the absolute values: 10 – 6 = 4.) = -(|-10| – |-6|)
(Use the sign of the number with the greater absolute value) = -4

Question 5.
3 – (-11) ___________
3 – (-11) = 3 + 11 = 14 (To subtract an integer, add itâ€™s opposite.)

Question 6.
12 – 7 ___________
(To subtract an integer, add itâ€™s opposite) 12 – 7 = 12 + (- 7)
(The signs are different, so find the difference of the absolute values: 12 – 7 = 5.) = |12| – |7|
(Use the sign of the number with the greater absolute value) = 5

Question 7.
-4 – 11 ___________
(To subtract an integer, add itâ€™s opposite.) -4 – 11 = – 4 + (-11)
(The signs are both negative, so the sum of integers is negative.) = -15

Texas Go Math Grade 8 Transformations and Congruence Module 12 Answer Key Question 8.
0 – (-12) ___________
0 – (-12) = 0 + 12 = 12 (To subtract an integer, add itâ€™s opposite)

Use a protractor to measure each angle.

Question 9.

Use a protractor to determine the angle measure.
The angle measure is 35Â°.

Question 10.

Use a protractor to determine the angle measure.
The angle measure is 130Â°.

Module 12 Transformations and Congruence Answer Key Question 11.

Use a protractor to determine the angle measure.
The angle measure is 85Â°.

Visualize Vocabulary

Use the âœ“ words to complete the graphic organizer. You will put one word in each oval.

Understand Vocabulary

Match the term on the left to the correct expression on the right.