Ok so this week was basically a review for the test on Tuesday. I think that everyone basically has it down pack with how to do SOHCAHTOA, law of sines, and law of cosines. But what might confuse some people is when SOHCAHTOA, law of sines, and law of cosines is actually used. To start, SOHCAHTOA is used when you have a right triangle. This is the only formula that you use on a right triangle. Then for law of sines, there must be a pair. By a pair i mean that an angle has to have an opposite side and visa versa. If there are two of those then law of sines is used. And last for law of cosines. Law of cosines is used when you have a two legs and an angle inbetween. For law of cosines you would usually try to find all angles and sides.
There is one thing im a little confused about. I get a little confused when it askes me to find the are of a parallelogram. I know that you have to cut the parallelogram into two triangles and find the triangle's angles and sides if not listed but what im confused about is when you actually cut an angle because then you cant just cut it in half and so i get confused about how to find that angle of that specific triangle.
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to find the angle all u have to do is do the law of cosines and take an inverse of the cosine to find the angle
ReplyDeleteyou will cut the parallelogram diagonally in half to make the parallelogram into two triangles. I cant pecifically tell you where to go from there because each problem is different. But you must solve for each triangle seperately and you know how to tell which method to use when solving for a triangle. once you have what is necessary to find the area of each triangle you then add the two areas together to get the area of the entire parallelogram.
ReplyDeleteok so two triangle make up a parallelogram right? well all you do is cut the parallelogram in half from one angle to the opposite angle, then from there you would solve it like two separate triangles. Depending on what kind of triangles you make when you cut the parallelogram determines what steps you will be using for the problem. In the end you add up the two triangles.
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