Methods to Solve Right Triangles

• Pythagorean Theorem

• 45 45 90

• 30 60 90

• Trigonometry

• Inverse Trigonometry

• Pythagorean Theorem

• 45 45 90

• 30 60 90

• Trigonometry

• Inverse Trigonometry

• Pythagorean Theorem

• 45 45 90

• 30 60 90

• Trigonometry

• Inverse Trigonometry

To use the Pythagorean Theorem, we need...

• A triangle with 2 known angles

• A right triangle with 2 known angles

• A triangle with 2 known sides

• A right triangle with 2 known sides

We can use SOH-CAH-TOA for...

• Any triangle ever

• Non-right triangles only

• Right Triangles only

• Never

Set up the problem...

• sin X = 41/28

• tan X = 41/28

• cos X = 28/41

• sin X = 28/41

Fill in the blank...
SOH ___ TOA

• COH

• CAH

• COA

• CHA

Find x.

• 10

• √3

• 5

• 10√3

Determine which method would be most efficient for finding side x.

• SOH-CAH-TOA

• Pythagorean Theorem

• Law of Cosines

• Special Right Triangles

Determine which method would be most efficient for finding side v.

• SOH-CAH-TOA

• Law of Cosines

• Pythagorean Theorem

• Special Right Triangles