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16 Cards in this Set

  • Front
  • Back
perpendicular bisector
a segment, ray or plane that is perpendicular to a segment at its midpoint
equidistant from two points
the same distance from one point as from another point
distance from a point to a line
the length of the perpendicular segment from the point to the line.
equidistant from two lines
the same distance from one line as from another line
perpendicular bisector of a triangle
a line ray or segment that is perpendicular to a side of a triangle at the midpoint of the side
concurrent lines
three or more lines that intersect in the same point
point of concurrency
the point of intersection of concurrent lines
circumcenter of a triangle
the point of concurrency of the perpendicular bisectors of a triangle
angle bisector of a triangle
a bisector of an angle of the triangle
incenter of a triangle
the point of concurrence of the angle bisectors triangle
median of a triangle
a segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side
centroid of a triangle
the point of concurrency of the medians of a triangle
altitude of a triangle
the perpendicular segment from a vertex of a triangle to the opposite side or to the line that contains the opposite side
orthocenter of a triangle
the point of concurrency of the lines containing the altitudes of a triangle
mid-segment of a triangle
a segment that connects the midpoints of two sides of a triangle
indirect proof
a proof in which you prove that a statement is true by first assuming that its opposite is true. if this assumption leads to an impossibility then u have proved that the original statement is true