Line Segment Postulates

Find the length indicated.

Find the length indicated.

Write an equation that correctly models the lengths shown.

• 2x + 20 + x + 21 = 9

• 2x + 20 + 9 = x + 21

• 9 + x + 21 = 2x + 20

• 2x + 20 - 9 = x + 21

Write an equation that correctly models the lengths shown.

• 3x + 2 + 6 = 2x - 2

• 2x - 2 + 6 = 3x + 2

• 6 - 3x - 2 = 2x - 2

• 2x + 2 + 3x + 2 = 6

A flat surface is called a...

• plane

• line

• point

• ray

Part of a line that has a beginning, but no end is called a...

• line segment

• ray

• angle

• plane

A straight path with no beginning or end is a...

• ray

• line

• plane

• angle

Part of a line that has a beginning and an end is called a...

• ray

• plane

• angle

• line segment

A specific location in space is called a...

• line

• point

• line segment

• ray

Use Segment Addition Postulate to write and equation and solve for x.

• 5

• 7

• 14

• 21

Answer explanation

Segment Addition Postulate

AB + BC = BC

2x + 3x + 5 = 40

5x + 5 = 40

5x = 35

x = 7