Special Triangles + Formulas

30 - 60 - 90

1, sqrt3, 2

45 - 45 - 90

1, 1, sqrt2

Common Special Triangle 1

5, 12, 13

Common Special Triangle 2

3, 4, 5

Circumference of a Circle

pi x d

Area of a Circle

pi x r-sqrd

Diameter of a Circle

2 x Radius

Circumference of a Circle - 2

2 x pi x radius

Area of a rectangle

l x w

Area of a Triangle

b x h / 2

Probability

Desired outcomes / possible outcomes