Vocabulary
Define Midpoint
the midpoint is the middle point of a line segment. It is equidistant from both endpoints, and it is the centroid both of the segment and of the endpoints. It bisects the segment.
Define Congruent Segments
Congruent segments are simply line segments that are equal in length. Congruent means equal.Congruent line segments are usually indicated by drawing the same amount of little tic lines in the middle of the segments, perpendicular to the segments.
Define Right Angle
In geometry and trigonometry, a right angle is an angle of exactly 90°, corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles.
Define Linear Pair
Angles that are adjacent angles whose non-shared side forms a straight angle
Define Perpendicular Lines
Lines that intersect to form 4 right angles
Define Angle Bisector
An angle bisector is a line or ray that divides an angle into two congruent angles. ... The bisectorof an angle consists of all points that are equidistant from the sides of the angle. The three angle bisectors of a triangle are concurrent and intersect at a point called the incenter.
Define Angle Addition Postulate
The Angle Addition Postulate states that: If point B lies in the interior of angle AOC, then. . The postulate describes that putting two angles side by side with their vertices together creates a new angle whose measure equals the sum of the measures of the two original angles.
Define Obtuse Angle
An obtuse angle is more than 90° but less than 180° In other words, it is between a right angle and a straight angle.
Define Vertical Angles
Non-adjacent angles formed by 2 intersecting lines, they are congruent
Define Transversal
an arbitrary line that intersects at least 2 other lines
Define Compass
A compass is a drawing instrument used for drawing circles and arcs. It has two legs, one with a point and the other with a pencil or lead.
Define Segment Addition Postulate
In geometry, the Segment Addition Postulate states that given 2 points A and C, a third point B lies on the line segment AC if and only if the distances between the points satisfy the equation AB + BC = AC. ... The segment addition postulate is often useful in proving results on the congruence of segments
Define Acute Angle
acute angle. An angle that measures less than ninety degrees but more than zero degrees.
Define Supplementary Angles
angles whose sum is 180 degrees
Define Interior Angles
Angles that are located inside of a figure
Define Protractor
A protractor is a tool used to measure angles. A protractor is a transparent plastic tool designed to measure angles. They are usually semicircular but also are available in a full circle 360° version. Origin. The small hole near the bottom of the protractor is aligned over the vertex of the angle to be measured.
Define Line Segment
In geometry, a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints. A closed line segment includes both endpoints, while an open line segment excludes both endpoints; a half-open line segment includes exactly one of the endpoints.
Define Straight Angle
A straight angle is 180 degrees. This is a straight angle. A straight angle changes the direction to point the opposite way
Define Complementary Angles
angles whose sum is 90 degrees
Define Exterior Angles
Angles that are located outside of a figure
Define Congruent Angles
Congruent Angles have the same angle (in degrees or radians). That is all. These angles are congruent. They don't have to point in the same direction. They don't have to be on similar sized lines.
Define Angle
In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
Define Adjacent Angles
Angles that lie in the same plane and share a common vertex and side
Define Parallel Lines
2 or more lines whose points are equidistant from the points on each line that is parallel to
Define Corresponding Angles
Angles that are formed on the same side of the traversal and in the same location on opposite lines