triangle methods

triangle methods

1. pythagoras

   • a2 +b2 =c2
     • only right angled triangles
     • two sides needed
     • no angles needed

2. trigonometry

   • sohcatoa
     • label opposite, adjacent and hypotemuse
     • right angled triangles
     • two known sides
       • one angle needed

3. sine

   • one side needed
     • not right angled triangle
     • a/sinA = b/sinB =c/sinC
       • side - label angles A,B,C sides opposite are abc
         • side/sin(angle) x sin(angle)
   • angle - two sides one angle
     • sinA/a = sinB/b = sinC/c
       • label sides a,b,c - opposite angles labelled A,B,C,