Law of Sines

Law of Sines

Open Ended

In a right triangle, which 2 sides make up the sin?

Sin A, Sin B and Sin C are the angles.

a, b and c are the length of the sides.

​Law of Sines work on all types of triangles.

​Law of Sines

Solving

1. Find value of the angle using Sine

2. Cross multiply

3. Divide

​

​Law of Sines

​Law of Sines

Multiple Choice

How would you set this up?

• $$\frac{Sin60}{20}=\frac{Sin40}{b}$$

• $$\frac{Sin60}{b}=\frac{Sin40}{20}$$

• Can not be set up

Draw

Solve for b

Open Ended

How do you think we can find the length of AB, c?

Finding AB, c

Draw

Find the length of c.

​Finding Missing Angle

Multiple Choice

Which angle can I solve for?

• $$\angle\ C$$

• $$\angle\ B$$

Open Ended

Why can't I solve for $$\angle C$$ ?

​Finding Missing Angle

Draw

Find $$\angle\ B$$

Draw

Find other missing parts