Geometry: Ch. 5 Vocab Flashcards
(15 cards)
Point of concurrency
The point at which concurrent lines intersect.
Concurrent
When three or more lines intersect in one point.
Circumcenter
The point of concurrency of the perpendicular bisectors of a triangle.
Incenter
The point of concurrency of the angle bisectors of a triangle.
Median
A segment whose end points are a vertex and the midpoint of the opposite side.
Altitude
The perpendicular segment from a vertex to the line containing the opposite side.
Orthocenter
The point of intersection of the lines containing the altitudes of the triangle.
Negation
A statement that had the opposite meaning of the original statement.
Inverse
The _________ of the conditional “if p, then q” is the conditional “if not p, then not q”
Contrapositive
Switches the hypothesis and the conclusion of a conditional and negates both.
Equivalent statements
Statements with the same truth value.
Indirect reasoning
All possibilities are considered and then all but one are proved false. The remaining possibility must be true.
Indirect proof
A proof involving indirect reasoning.
Centroid
The point of concurrency of the medians.
Midsegment
The segment that joins the midpoints o two sides of a triangle.
