Supplementary Angles
two angles who’s sum is 180
Right angle
an angle who’s sum is 90 degrees
complementary angles
two angles that add up to 90 degrees
vertex
the point where two lines meet and form an angle
the sum of the interior angles of a triangle
180 degrees
obtuse
the sum of the two shorter sides squared is less than the larger side squared
acute
the sum of the two shorter sides squared is bigger than the larger side squared
right
the sum of the two smaller sides squared is equal to the larger side squared.