2.1.2 Can You Really Add & Subtract Segments?

Multiple Choice

If a yardstick is 36 inches and you cut one foot off the yardstick, how many inches would be left?

• 18 inches

• 12 inches

• 24 inches

• 32 inches

Multiple Choice

Why can't you create a negative line segment when subtracting lengths?

• Because a line segment must have a positive length

• Because subtraction is not allowed in geometry

• Because negative numbers are not used in geometry

• Because line segments can only be added

Multiple Select

Which verbal description(s) describes the line segment shown?

• $$\overline{DE}$$ is added to $$\overline{EF}$$ to make $$\overline{DF}$$

• $$\overline{DF}$$ is added to $$\overline{FE}$$ to make $$\overline{DE}$$

• $$\overline{DE}$$ can be subtracted from $$\overline{EF}$$ to make $$\overline{DF}$$

• $$\overline{DF}$$ can be subtracted from $$\overline{DE}$$ to make $$\overline{FE}$$

Multiple Select

Which statement about the line segment shown below is true?

• CE - DE = CD

• CE + DE = CD

• CD + CE = DE

• DE - CE = CD

Math Response

Draw a quick diagram in your notebook!

If $$\overline{AB}$$ contains C, AC = 4 and CB = 3, what is the length of AB?

Type answer here

Correct Answer: 7

Deg^°

Rad

Math Response

Draw a quick diagram in your notebook!

Point E is on $$\overline{DF}$$

$$\overline{DE}$$ is 4 centimeters, and $$\overline{EF}$$ is 7 centimeters.

How long is $$\overline{DF}$$ in centimeters?

Type answer here

Correct Answer: 11

Deg^°

Rad

Multiple Choice

Which steps are involved in solving a two-step equation as described in the slides?

• Subtract or add to isolate the variable, then multiply or divide to solve for the variable

• Multiply both sides by the variable, then add a constant

• Combine like terms, then factor the equation

• Graph both sides and find the intersection

Multiple Select

Which 3 of the following steps are necessary when solving equations with a variable on both sides?

• Subtract the variable from both sides

• Add or subtract constants to both sides

• Divide by the coefficient of the variable

• Multiply both sides by zero

Multiple Choice

Draw a diagram, fill in the information, write an equation and solve for x!

• 9

• 7

• 4

• 12

Math Response

QR + RS = QS

QR = a + 3

RS = 4a + 2

QS = 7a – 7

What is the length of RS?

Type answer here

Correct Answer: 26

Deg^°

Rad

Multiple Choice

CD + DE = CE

CD = 2a + 5

DE = 3a - 1

CE = 9a - 8

What is the length of CE?

• 3

• 11

• 19

• 8

​It's Time To...

Show What You Know!!!

Multiple Choice

Which of the following statements is true about the diagram of MP?

• MN + MP = NP

• NO + OP = MP

• MP – OP = NO

• MP – NP = MN

Multiple Choice

If MN = 8 cm, OP = 4cm, and MP = 21 cm, What is NO?

• 33 cm

• 25 cm

• 9 cm

• 15 cm

Multiple Choice

IF CD + DE = CE and

CD = 6x + 8 and DE = 3x - 5,

What is the correct expression for CE

• 3x + 13

• 9x + 3

• 3x + 3

• 9x + 13

Open Ended

What questions do you still have about adding and subtracting segments?