Refer to our Texas Go Math Grade 8 Answer Key Pdf to score good marks in the exams. Test yourself by practicing the problems from Texas Go Math Grade 8 Module 12 Answer Key Transformations and Congruence.

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

**Texas Go Math Grade 8 Module 12 Are you Ready? Answer Key**

**Find each difference.**

Question 1.

5 – (-9) ___________

Answer:

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

Question 2.

-6 – 8 ___________

Answer:

(To subtract an integer, add it’s opposite) -6 – 8 = – 6 + (- 8)

(The signs are the same negative, so the sum of integers is negative) = – 14

Question 3.

2 – 9 ___________

Answer:

(To subtract an integer, add it’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) ___________

Answer:

(To subtract an integer, add it’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) ___________

Answer:

3 – (-11) = 3 + 11 = 14 (To subtract an integer, add it’s opposite.)

Question 6.

12 – 7 ___________

Answer:

(To subtract an integer, add it’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 ___________

Answer:

(To subtract an integer, add it’s opposite.) -4 – 11 = – 4 + (-11)

(The signs are both negative, so the sum of integers is negative.) = -15

Question 8.

0 – (-12) ___________

Answer:

0 – (-12) = 0 + 12 = 12 (To subtract an integer, add it’s opposite)

**Use a protractor to measure each angle.**

Question 9.

Answer:

Use a protractor to determine the angle measure.

The angle measure is 35°.

Question 10.

Answer:

Use a protractor to determine the angle measure.

The angle measure is 130°.

Question 11.

Answer:

Use a protractor to determine the angle measure.

The angle measure is 85°.

**Texas Go Math Grade 8 Module 12 Reading Start-Up Answer Key**

**Visualize Vocabulary**

Use the ✓ 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.

Answer:

1. – A. Transformation is a function that describes a change in the position, size,or shape of a figure.

2. – C. Reflection is a transformation that flips a figure across a line.

3. – B. Translation is a function that slides a figure along a straight line.

**Active Reading**

Booklet Before beginning the module, create a booklet to help you learn the concepts in this module. Write the main idea of each lesson on each page of the booklet. As you study each lesson, write important details that support the main idea, such as vocabulary and formulas. Refer to your finished booklet as you work on assignments and study for tests.