1. 2 Solving Non-Right Triangles: Sine Law
Practice Questions
Haese & Harris 3rd Ed
(pdf on Moodle)
Ex 9.2 p223 Q1, 2, 4, 5

2. Sine Law THE SINE LAW STATES: STANDARD LABELING OF A TRIANGE
CAPITAL letters are used to label VERTICES
Sides are labeled with lowercase letters
The side and vertex opposite each other are labeled with the same letter
THE SINE LAW STATES:

3. When to use Sine Law
You can use sine law to solve a non-right triangle if you know:

4. Examples to Try
1. Solve the following triangles giving the lengths of the sides in centimeters, correct to one decimal place and angles correct to the nearest degree.

5. The Ambiguous Case

6. Examples to Try
2. Draw diagrams showing the triangles in which AC = 17cm, BC = 9cm and a = 29° and solve these triangles.

7. Examples to Try
3. Find ∠ABC for the triangle ABC given that a = 50, b = 80 and A = 35°.

8. Examples to Try
4. Find ∠ABC for the triangle ABC given that a = 70, c = 90 and A = 75°.