Right Triangles

30-60-90 triangle : A right triangle with interior angle measures of 30 degrees, 60 degrees, and 90 degrees.

45-45-90 triangle : An isosceles right triangle with interior angle measures of 45 degrees, 45 degrees, and 90 degrees. In a 45-45-90 triangle, the hypotenuse is 2√square root of 2 times as long as either leg..

DMS : Stands for the degree-minute-second form for writing an angle. It gives an alternative to using decimals for degree measures.

equilateral triangle : A triangle in which all the sides are the same length and all the angles are 60 degrees.

similar triangles : Triangles whose corresponding angles are equal. This also means that the corresponding side lengths are proportional.

terminal point : A point P(x,y)that defines an arc measuring angle θ along a circle.