Vocab 1
A point at an end of a segment, or the starting point of a ray.
What is an Endpoint?
A set of infinite collinear points extending forever in opposite directions.
What is a Line?
A location in space with no size or thickness.
What is a Point?
Lines in the same plane that do not intersect and they remain equidistant.
What are parallel lines?
An angle whose measure is 90 degrees.
What is a Right Angle?
A set of points that lie on the same line.
What is collinear?
Two angles whose measures have a sum of 180.
What are Supplementary Angles?
A part of a line consisting of two endpoints and all points between them.
What is a Line Segment?
An angle that measures greater than zero and less than 90°
What is an acute angle?
This is a triangle whose angles are all less than 90.
What is an Acute Triangle?
To divide into two congruent parts.
What is Bisect?
A flat surface that has no thickness and extends forever in two directions.
What is a plane?
A figure formed by two rays with a common endpoint.
What is an Angle?
An angle whose measure is greater than 90, but less than 180.
What is an obtuse angle?
A triangle with two congruent sides and two congruent angles
What is an Isosceles Triangle?
The common endpoint of the sides of an angle.
What is a Vertex?
A ray that divides an angle into two congruent angles
What is an Angle Bisector?
Two angles whose measures have a sum of 90.
What are Complementary Angles?
Two angles in the same plane with a common vertex and a common side, but no common interior points.
Two lines in the same plane that have opposite reciprocal slopes and intersect at a 90 degree angle.
What are perpendicular lines?
The non-adjacent congruent angles formed by two intersecting lines.
What are vertical angles?
A pair of adjacent, supplementary angles.
What is a Linear Pair?
Two angles whose measures have a sum of 180.
What are supplementary angles?
This is the set of all points that are equidistant from a certain point.
What is a circle?
A line perpendicular to a segment at the segment’s midpoint.
What is a Perpendicular Bisector?