has four equal sides
square
an eight sided figure
octagon
a seven sided figure
heptagon
a line that intersects two or more lines
transversal
a part of a line between two endpoints
segment
an angle that measures 90 degrees
right angle
points that lie on the same line
collinear
points that lie in the same plane
coplanar
distance between a and b
length
divides
bisect
common endpoint
vertex
usually given in degrees
measure
an angle less than 90 degrees
acute angle
an angle more than 90 degrees
obtuse angle
angles that add up to 90 degrees
complementary angles
two sides that form a right angle
leg
angles that add up to 180 degrees
supplementary angle
1 out of 360 of a circle
degree
a statement you believe to be true based on inductive reasoning
conjecture
angles that have the same measure
congruent angles