Pythagorean Triple
a set of nonzero whole numbers a, b, and c that satisfy the equation a2 + b2 = c2
tangent
the length of the leg opposite <A over the length of the leg adjacent to <A
Sine
the leg opposite <A over the hypotenuse
Cosine
The leg adjacent to <A over the hypotenuse
Identity
an equation that is true for all allowed values of the variable
Angle of Elevation
angle formed by a horizontal line and the line of sight to an object above the horizontal line
Angle of Depression
angle formed by a horizontal line and the line of sight to an object below the horizontal line