Home * Step 1 * Step
2 * Step 3 * Final
* Formulas * Conclusions
* Round Silo 

Triangle Formulas Law of Cosines:

Right Triangles ^{ } Pythagoras: c^{2 }= a^{2 } + b^{2 Area = 1/2ab} ^{ Trigonometric Functions: The Trig functions used on calculators are Sine, Cosine, and Tangent, Cosecant, Secant, and Cotangent are less used because they are the reciprocals of the big three. } ^{ Sin(A) = opposite/hypotenuse = a/c csc (A)= c/a Cos (A) = adjacent/hypotenuse = b/c sec (A) = c/b Tan (A) = opposite/adjacent =a/b cot (A) = b/a The Inverse Functions ASIN, ACOS, and ATAN, give "The angle whose Function is x", etc. for instance: ASIN (2/4)=30 degrees} 
Calculator and formulas for all aspects of all kinds of triangles triangleshttp://www.ajdesigner.com/phptriangle/right_triangle_pythagorean_theorem_c.php  
Resources I used for the
Round Silo Problem (mostly calculus level)
http://mathworld.wolfram.com/GoatProblem.html 

Squares and Rectangles 

polygons http://www.mathopenref.com/polygonregulararea.html http://www.1728.org/polygon.htm http://www.mathdefined.com/calculators/geometry/plane_geometry/regular_polygons.html http://www.mathopenref.com/polygonregular.html http://www.wolframalpha.com/ 