OK so I did have a little more trouble this week than last. The beginning of the week was pretty easy but as we went on it got harder. On thing I really picked up was SOHCAHTOA. This makes it so much easier to remember the sin, cos, tan formulas. So here's what SOHCAHTOA means.
SOHCAHTOA:
SOH: sin=opposite leg/hypotenuse
CAH: cos=adjacent leg/hypotenuse
TOA: tan=opposite leg/adjacent leg
You use this stuff for right triangles. You use this to either find one leg or the hypotenuse, or you can use it to find angle measures. If you have the hypotenuse and one angle measure other than the right angle you would use either sin or cos to find one of the other legs, depending on which leg you want to find. If you have both the legs and the hypotenuse you can use SOHCAHTOA to find the angle measures too.
I did have a good bit of trouble finding the area of a non right triangle.
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Solving for a nonright triangle consists of using the law of sines that you didnt say you had trouble with and after you solve for all leg measures and all angle measures you find the area of the triangle by plugging into 1/2(leg)(leg)(sin of angle between the leg measures you used)
ReplyDeletefinding the area of a non right triangle is a simple matter of plugging into a formula
okay well basically all you would do to find the area of a non right triangle is use this formula:
ReplyDeleteA= 1/2(leg)(leg)Sin (angle b/w)
Example:
two sides of a triangle have lengths 7cm & 4cm. the angle between the sides measures 73 degrees. find the area of the triangle.
so you would draw your triangle and use the formula for area of a non right triangle.
A= 1/2(7)(4)Sin(73)
A~ 13.388cm^2