Area of a Rectangle
A=bh
Area of a Parallelogram
A=bh
Area of a Triangle
A=1/2
bh
Pythagorean Theorem
c2=a2+b2
Converse of the Pythagorean Theorem
If c2=a2+b2
then its a right triangle.
45-45-90 Triangle Theorem
hyp = leg√2
30-60-90 Triangle Theorem
long = short√3
hyp = short x 2