Finding a Missing Side or Angles of a Right Triangle

Which equation can be used to solve for "x"?

• 15² – x² = 21²

• x² – 15² = 21²

• 15² + 21² = x²

• 21² – 15² = x²

The Pythagorean Theorem is used to find what?

• missing sides only

• missing angles only

• either missing sides or missing angles

Find the length of the missing side.

• 25 cm

• 42 cm

• 52 cm

• 48 cm

• 68 cm

A 10-foot ladder is leaning against the wall.  The bottom of the ladder is 4 feet from the base of the wall.  Which of the following is closest to the distance from the top of the ladder to the base of the wall?

• 9ft

• 11ft

• 6ft

• 14ft

What are some keywords or phrases in a word problem that tell you to use the pythagorean theorem? Check all that apply.

• Order the real numbers from least to greatest

• A rectangle with a diagonal

• A ladder leaning against a wall

• Find the corresponding angles

• When you are asked to find the distance

What is the second step in finding the missing side length of the right triangle?

What is the first step in finding the missing side length of the right triangle?

What is the second step in finding the missing side length of the right triangle?

Find the length of the missing side. 

• 20 in.

• 68 in.

• 16 in.

• 80 in.

Find the length of the missing side. 

• 17 cm

• 22 cm

• 15 cm

• 13 cm