Geomertry Vocab 1 Flashcards
Collinear Points
Two or more points on the same line
Coplanar points
Points on the same plane
Line segment
Two points on a line and all the points in between them
Endpoints
The points at the end of a line segment or ray
Congruent
Figures that are the same size or measure/shape
Midpoint
The point of a segment that divides it into two congruent segments
Ray
Part of a line with one endpoint
Circle
A set of points equidistant from a given point called the center
Chord
A segment joining two points on a circle
Radius
A segment joining the center of a circle and a point on the circle
Diameter
A segment joining two points on a circle and that passes through the center
Arc
Two points on a circle and the space in between
Semi-Circle
If the points are at the ends of the diameter the arc becomes a…
Circumference
The distance around a circle
Adjacent angles
Two angles that have a common side and a common vertex, but do not overlap
Angle bisector
A ray that divides an angle into two congruent angles
Angles
Two rays with a common end point, called a vertex
Acute angle
An angle with a measure in between 0 degrees and 90 degrees
Right angle
An angle with a measure of 90 degrees
Obtuse angle
An angle with a measure in between 90 degrees and 180 degrees
Straight angle
An angle with a measure of 180 degrees
Perpendicular
If two lines intersect to form for congruent angles the lines are… each of the congruent angles is a right angle.
Complementary angles
Two angles whose measures have a sum of 90°
Supplementary angles
Two angles whose measures have a sum of the 180°
Vertical angles
When two lines intersect to form four angles. (The nonadjacent angles are called vertical angles) they are congruent
Transversal
A line that intersects with two other lines
Vertex
A point that is a common endpoint of an angle or where sides of a polygon meet
