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By: Mark Schreiner and Tyler Johnson

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Law of sines is an equation relating the lenghts of the sides of an arbitrary triangle sines of its angle. Law of sines is a equation to find angle measures inside a regular triangle. You can practice this at- **law of sines practice**.

  • Law of sines was discovered in the 10th century.
  • Law of sines was created by Abu Nasr Mansur.
  • If you want to figure out a angle measuement you will need this equation.-

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  • If you want to deturmine a side of a triangle you need to use this equation-

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  • In the equation the common value of the three is actually the diameter of the triangle's circumcircle.
  • A circle which passes through all three vertices of a triangle is called a circumcircle.
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    <----- circumcircle.

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  • Problem #1
John wants to measure the height of a tree. He walks exactly 100 feet from the base of the tree and looks up. The angle from the ground to the top of the tree is 33º. This particular tree grows at an angle of 83º with respect to the ground rather than vertically (90º). How tall is the tree?