10-5 Pythagorean Theorem

Pythagorean Theorem

How to solve for missing sides of right triangles.

Learning Target:

I can solve for missing sides of right triangles using the Pythagorean Theorem.

Pythagorean Theorem

Formula: a² + b² = c²

• "a" and "b" are legs

• "c" is the hypotenuse (always opposite of the right angle)

Labelling

Label the parts of the triangle.

Drag labels to their correct position on the image

Hypotenuse c

Leg b

Leg a

Poll

Determine the length of the missing side.

• 7

• 8

• 17

• 23

Multiple Choice

Name the longest side of a right triangle.

• leg a

• leg b

• leg 

• hypotenuse

Multiple Choice

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

• x² + 15² = 21²

• x² – 15² = 21²

• 15² + 21² = x²

• x² + 21² = 15²

Poll

^{Find the missing side}

• 9

• 41

• 6.4

• 3