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Warm-Up. Use any technique that we have discussed in class to find the area of the triangle. HW Check. Unit 4 Day 9. Law of Sine. Wouldn’t it be nice if there were a quicker way to find the two missing sides of the triangle in the warm up? There is !. Law of Sine.
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Warm-Up Use any technique that we have discussed in class to find the area of the triangle.
Unit 4 Day 9 Law of Sine
Wouldn’t it be nice if there were a quicker way to find the two missing sides of the triangle in the warm up? There is!
Law of Sine Consider the following triangle • Find h in terms of a and the sine of an angle. • Find h in terms of b and the sine of an angle. • We know that the value of h is the same in both of the smaller triangles. • So, if h = h, then aSinB=bSinA. • We can rearrange this to get:
Law of Sine We use the Law of Sine to solve for a missing side or angle of a triangle that is not a right triangle. The formula can be written as but we usually only use two parts of the formula.
Classwork 4.10 Law of SinesPractice Pg