Exam 1	Exam 2	Exam 3
isosceles triangle	similar (triangles)	isometry
median	similar (figures)	fixed point
altitude	centroid	translation
transversal	circumcircle	reflection
corresponding angles (of transversal)	circumcenter	rotation
alternate interior angles (of transversal)	circumradius	glide reflection
alternate exterior angles (of transversal)	orthocenter	identity
supplementary angles	medial triangle	figure
complementary angles	incenter	image of a figure
exterior angle (of triangle)	Euler line	symmetry of a figure
diagonal (of polygon)	pedal points
reflex angle	pedal triangle
parallelogram	nine-point circle
rhombus	concurrent
rectangle
trapezoid	Terms for the Final, not on Exam 2:
semiperimeter	interior cevian
circle	exterior cevian
radius	Gergonne point
chord	cevian product
diameter
arc
central angle
inscribed angle
secant (to circle)
tangent (to circle)