-How to use sine law to determine side lengths and angle measures in obtuse triangles.
-How to use the cosine law to determine side lengths and angle measures in obtuse triangles.
-Solving problems that can be modelled using obtuse triangles.
In class we worked on a problem together. The problem is as follows:
On a dogleg hole, golfers have a choice between playing it safe and making the green in two shots or taking a chance and trying for the green in one shot. Jay can hit a ball between 170 and 190 yards from the tree with a 3-iron. Is it possible for Jay to make it to the green at this hole in one shot with a 3-iron? Explain.
This is the diagram we drew:
We figured out what side “a” was by using cosine law.
a(squared)= 51(squared) + 160(squared) - 2(51)(160) cos110
a=184 yrds.
Therefore, yes he could make it to the green in one shot.
After that, we filled in the chart on page 162 and compared our answers with a partner.
Next is Allysa! (:
By Kelsey.
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