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17 Cards in this Set
 Front
 Back
intersect

To have one or more points in common.


intersect

glossary


midpoint

the point that divides or besects a segment into two congruent segments.


angle bisector

a ray that divides an angle into two adjacent angles that are congruent


perpendicular lines

Two lines that intersect to form a right angle


perpendicular bisector

a segmant, ray, line, or plane that is perpendicular to a segmant and its midpoint


perpendicular bisector of a triangle

a line, ray, or segmant that is perpendicular to a side of a trianlge at the midpoint of the side


concurrent lines

3 or more lines that intersect in the same point


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 concurrency of the angle bisectors of the triangle


Median of a triangle

a segmant whos 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 tiangle


altitude of a triangle

the perpendicular segment from a vertex of a tiangle to the opposite side or to the line that contains the oppisite side


orthocenter of a triangle

the [pmt pf concurrency of the lines containing the altitudes of a tiangle


midsegmant of a triangle

a seg,emt 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 you have proved that the original statement is true.
