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15 Cards in this Set

  • Front
  • Back
circumcenter
the point of concurrency of the perpendicular bisectors of a triangle
incenter
the point of concurrency of the angle bisectors of a triangle
centroid
the point of concurrency of the medians of a triangle
altitude
the perpendicular segment from a vertex of a triangle to the opposite side or to the line that contains the opposite side
orthocenter
the point of concurrency of the lines containing the altitudes of a triangle
concurrent lines
three or more lines that intersect in the same point
corollary
a statement that can be proved easily using a theorem or a definition
base angles
angles that are on the base of a isosceles triangle
skew lines
two lines that do not intersect and are not coplanar
supplementary

complementary
adds up to 180

adds up to 90
converse
switching the hypothesis and the conclusion
1->2
2->1
inverse
the statement formed when you negate the hypothesis and conlusion of a conditional statement
<3-> <3
</3-> </3
contrapositive
the statement formed when you negate the hypthesis and concluesion of the converse of a conditional statement
if 1 then 2
if not 2 then not 1
biconditional statement
a statement that contains the phrase if and only if
equivalent statements
when two statements are both true or both false