Geometry Vocab 1
Having the same measure
Congruent
A segment of a tangent with one endpoint on a circle.
tangent segment
Angle Bisector
A ray that divides an angle into two congruent angles.
A one dimensional figure with length but no width.
A line
Equidistant and non-intersecting planes.
Parallel Planes
A point that is neither on the angle or nor in the interior of the angle.
Exterior
One of the two congruent parts into which a great circle separates a sphere
hemisphere
Transversal
A line that intersects two or more lines in a plane at different points
An angle that is greater than 90o and less than 180o
Obtuse angle
Inside angles of two lines that are intersected by a transversal.
Interior Angles
Points that lie within the same line.
Collinear
A segment that is drawn from the center of a regular polygon perpendicular to a side of the polygon
Apothem
Coplanar
Points that lie in the same plane.
A line with a single end point or point of origin that extends infinitely in one direction
Ray
Two adjacent angles which have noncommon sides that are opposite.
Linear Pair
Coplanar lines that never intersect.
Parallel Lines
The point of concurrency of the medians of a triangle
Centroid
Vertical Angles
Two nonadjacent angles formed by two intersecting lines.
A location represented by a dot
A Point
When two lines intersect and are not perpendicular.
Oblique Lines
Two angles with measures that add up to a sum of 180 degrees.
Supplementary Angles
A directed segment representing a quantity that has both magnitude, or length, and direction
Vector
Adjacent Angles
Two angles that lie in the same plane, have a common vertex and a common side, but no common interior points.
An angle less than 90o but more than 0o
Acute Angle
A pair of angles formed by two lines and a transversal consisting of an interior angle and an exterior angle that have different vertices and lie on the same side of the transversal.
Corresponding Angles