Prove and Solve Proportions

To measure the distance across a pond, a surveyor locates points A, B, C, D, and E as shown.  What is AB to the nearest meter?

• 10

• 12

• 15

• 18

The triangles are similar, solve for the question mark.

• 8

• 12.5

• 18

• 24

• DF

• BD

• CE

• CG

• 5
• 10
• 12
• 15

• BC

• AC

• MD

• MC

The following triangles are similar, which of the answers below would represent their proportions?

• 
• 
• 
• 

• 3
• 40
• 42
• 104

Find side length X.

• 22.5

• 10

• 9

• 7.5

Find the value of x.

• 10

• 35

• 8

• None of these

Find the value of x using proportions.

• a

• b

• c

• d