Terms in this set (22)
where all the perpendicular bisectors of a triangle intersect
Bisects a segment and is perpendicular to it.
to cut exactly in half
The point of concurrency of the medians of a triangle
a line that goes from a vertex to the midpoint of the opposite side
A segment connecting the midpoints of 2 sides of a triangle
a line going from a vertex to the opposite side, making a right angle
a ray that divides an angle into 2 congruent angles
the point of concurrency of the altitudes of a triangle
the point of concurrency of the angle bisectors of a triangle
2 lines that intersect to form a right angle
two or more angles that add up to 180 degrees
To draw a circle around, touching all vertices
To draw a figure within another so that their boundaries touch but do not intersect.
Angles that have the same position on two different parallel lines cut by a transversal.
alternate interior angles
angles between 2 lines and on opposite sides of a transversal
alternate exterior angles
Angles that lie outside a pair of lines and on opposite sides of a transversal.
same side interior angles
The two angles that are inside (interior) the parallel lines and are on the same side of the transversal Are SUPPLEMENTARY (add up to 180 degrees)
A pair of opposite congruent angles formed by intersecting lines
Angles that add to 180 degrees.
Two angles whose sum is 90 degrees