Monday, 17 October 2011

Proving and Applying the Sine Law


Today we learned about the sin law, which can be used to determine unknown side lengths or angle measure in acute angles. To use the sin law you need to know either two side lengths and a angle opposite to a known side, or two angles or any side. If you know the measure of two angles in a triangle, you can determine the third angle because all triangles have to add up to 180. We used the formulas shown below to find all unknown angles and side length.






We we went through the examples on pages 118-123 to get more of a clearifiactaion as to how to use the formulas.

We finished class off with an assignment on page 125.

Next will be Tanner! :)

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