Proportions in Triangles

Proportions in Triangles

by Deb Scott

Objective: Use the Side-Splitter Theorem and the

​Triangle-Angle- Bisector Theorem

Multiple Choice

Find the missing length.

• 21
• 18
• 16
• 24

Multiple Choice

Find the missing length.

• 6
• 8
• 5
• None of these

Multiple Choice

Solve for x.

• 10

• 5

• 7

• 4

Multiple Choice

The Side Splitter Theorem states that If a line is parallel to one side of a triangle and intersects the other two sides, then $$\frac{AB}{BC\ }=\frac{AE}{?}$$ What is the question mark?

• BE

• CD

• AD

• ED

Multiple Choice

Solve for x.

• 8
• 6
• 5
• -8

Multiple Choice

Which proportion should you use to find x?

• 15 / x = 7 / 14

• x / 7 = 14 / 15

• 7 / x = 15 / 14

• x / 15 = 7 / 14

Multiple Choice

Find the value of x.

• 17.5
• 10
• 7
• 17

Multiple Choice

Find the missing length.

• 10

• 21

• 35

• 9

Multiple Choice

Find the missing length.

• 25

• 15

• 6

• 16

Multiple Choice

Find the missing length.

• 15

• 11

• 35

• 8

Multiple Choice

Solve for x.

• 5

• 10

• 3

• 8

Multiple Choice

Solve for x.

• 10

• 9

• 6

• 5

Multiple Choice

Find the missing length indicated.

• 45

• 28

• 7

• 30

Multiple Choice

Find the missing length indicated.

• 3

• 12

• 27

• 24

Multiple Choice

Find the missing length indicated.

• 5

• 54

• 3

• 35

Multiple Choice

Solve for x.

• 8

• 4

• 7

• 5

Multiple Choice

Solve for x.

• 8

• 7

• 5

• 10

Multiple Choice

Solve for x.

• 4

• 9

• 3

• 7

Multiple Choice

Solve for x.

• 9

• 8

• 5

• 7

Poll

Which is easier

• Side Splitter Theorem

• Angle Bisector Theorem

• Neither one is easier than the other

• Both are just as easy