Points
This is the name for an exact location in space with no size or dimension.
What is a point?
This extends forever in opposite directions and is named using two points.
What is a line?
This flat surface extends infinitely and can be named using three non-collinear points.
What is a plane?
A pair of angles that add up to 90°.
What are complementary angles?
A statement written in “if–then” format is called this.
What is a conditional statement?
These three points lie on the same straight path.
What are collinear points?
These lines never meet and stay the same distance apart.
What are parallel lines?
If a line touches a plane at exactly one point, the line is said to do this.
What is intersect the plane?
A pair of angles that share a vertex and a side, and lie next to each other.
What are adjacent angles?
This part of a conditional statement follows the word “if.”
What is the hypothesis?
The point where two lines, rays, or segments meet is called this.
What is an intersection?
Lines that intersect to form right angles are called this.
What are perpendicular lines?
Two planes that never intersect are called this.
What are parallel planes?
Angles opposite each other when two lines intersect; they are always congruent.
What are vertical angles?
This is the process of using facts, rules, and definitions to reach a logical conclusion.
What is deductive reasoning?
A point halfway between the endpoints of a segment is called this.
What is the midpoint?
A part of a line with one endpoint that extends endlessly in one direction.
What is a ray?
A line that lies completely within a plane is described using this word.
What is coplanar?
Angles that add up to 180°.
What are supplementary angles?
The statement formed by switching the hypothesis and conclusion of a conditional.
What is the converse?
A point that divides a segment into two congruent segments but not necessarily at the midpoint is called this.
What is a point of concurrency?
A line that intersects a segment at its midpoint and forms a right angle is called this.
What is a perpendicular bisector?
This term describes when a point, line, or segment lies in the same plane as others.
What is coplanar (or being coplanar)?
When a transversal crosses two parallel lines, these angles are outside the lines and on opposite sides of the transversal.
What are alternate exterior angles?
A group of statements where the original statement and its contrapositive are always logically equivalent.
What are logically equivalent statements?