Finding the Length of Line Segments on Graph

Which of the following statements is true about line segment AB if M is the midpoint?

• The length of AB is half the length of AM

• The length from A to B is double the length from A to M

• M has the same x coordinate as B and A

• All are true

Line segment A'B' whose endpoints are (4, -2) and (16, 14) is the image of AB after a dilation of 1/2 centered at the origin. What is the length of AB?

• 5

• 10

• 20

• 40

After a dilation with center (0, 0) the image of DB is D'B'. If DB = 4.5 and D'B' = 18, the scale factor of this dilation is

• 1/5

• 5

• 1/4

• 4

Find AC

• 7

• 8

• 22

• 23

Calculate the length of the segment. (a)  

• 23.7 units

• 562 units

• 11.4 units

• 130 units

Find the length of the segment.

Leave your answer as a simplified square root.

Mathematical Equivalence

OFF

• Ray

• Segment

• Line

• Point

Example 2: Find x if the length of PR is 45 units in length. [Refer to the figure]

• 3

• 44

• 5

• 6

Suppose AC =  48, find the value of x. Then, find the length of AB.

• 13

• 16

• 12

• 15

Find the length indicated.