Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
Collinear Points
|
Points are collinear if there is a line that contains all of them.
|
|
|
Noncollinear Points
|
Points are noncollinear if no single line contains them all.
|
|
|
Coplanar Points
|
Points are coplanar if there is a plane that contains all of them.
|
|
|
Concurrent Lines
|
Lines are concurrent if they contain the same point.
|
|
|
Polygon
|
A polygon is a two-dimensional figure bounded by line segments and lies in a plane.
|
|
|
Polyhedron
|
A polyhedron is a three-dimensional figure bounded by polygons and exists in space.
|
|
|
Betweenness of Points
|
A point is between two other points on the same line iff its coordinate is between their coordinates.
|
|
|
Betweenness of Rays
|
A ray is between two others in the same half-rotation iff its coordinate is between their coordinates.
|
|
|
Midpoint of a Line Segment
|
A point is the midpoint of a line segment iff it divides the line segment into two equal segments.
|
|
|
Bisect of an Angle
|
A line bisects an angle iff it divides the angle into two equal angles.
|
|
|
Corollary
|
A corollary is a theorem that can be easily proved as a consequence of a postulate or another theorem.
|
|
|
Complementary Angles
|
Two angles are complementary iff their sum is 90 degrees.
|
|
|
Supplementary Angles
|
Two angles are supplementary iff their sum is 180 degrees.
|
|
|
Linear Pairs
|
Two angles are a linear pair iff they have a common side and their other sides are opposite rays.
|
|
|
Vertical Angles
|
Two angles are vertical angles iff the sides of one angle are opposite rays to the sides of the other.
|
|
|
Perpendicular Lines
|
Two lines are perpendicular iff they form a right angle.
|
|
|
Parallel Lines
|
Two lines are parallel iff they lie in the same plane and do not intersect.
|
|
|
Polygon
|
A polygon is a connected set of at least three line segments in the same plane, such that each segment intersects exactly two others, one at each endpoint.
|
|
|
Congruent Triangles
|
Two triangles are congruent iff there is a correspondence between their vertices such that all of their corresponding sides and angles are equal.
|
|
|
Scalene Triangles
|
A triangle is scalene iff it has no equal sides.
|
|
|
Isosceles Triangles
|
A triangle is isosceles iff it has at least two equal sides.
|
|
|
Equilateral Triangles
|
A triangle is equilateral iff all of its sides are equal.
|
|
|
Obtuse Triangles
|
A triangle is obtuse iff it has an obtuse angle.
|
|
|
Right Triangles
|
A triangle is right iff it has a right angle.
|
|
|
Acute Triangles
|
A triangle it acute iff all of its angles are acute.
|
|
|
Equiangular Triangles
|
A triangle is equiangular iff all of its angles are equal.
|
