acute triangle		is a polygon with all sides congruent and all angles
vertical angles		an angle between 0 degrees and 90 degrees
complementary		when the sum of 2 angles = 90 degrees
equilateral triangle		when the sum of 2 angles are =180 degrees
isosceles triangle		a triangle with one 90 degree angle
obtuse triangle		a trapezoid with exactly one pair of parellel
parallel lines		has 4 congruent sides and 4 right angles
parallelogram		is a quadrilateral with both pairs of opposie sides parallel
rectangle		has 3 congruent sides
congruent angles		angles that are betweeen 90 and 180 degrees
regular polygon		has at least 2 congruent sides
rhombus		is a triangle with no equal sides
right triangle		formed by 2 intersecting lines & are opposite each other
scalene triangle		has 4 congruent sides
square		angles with = measures
supplementary		a four sides figure with 4 right angles
trapazoid		lines on the same plane and never intersect