These angles share a common ray.
What are adjacent angles?
This goes on forever in both directions.
What is a line?
Parallel lines never meet.
What is the parallel postulate?
Reasoning gone wrong commits this.
What is a fallacy?
A Roman general and/or Mark Twain's home town on the Mississippi.
What is Hannibal?
Formed by intersecting lines, these angles across from one another are always congruent.
What are vertical angles?
This segment has a starting point but no end.
What is a ray?
Two adjacent angles form an angle that is the sum of the angles given.
What is the angle addition postulate?
NO=NO is an example.
What is the reflexive property of addition?
The largest feline and/or the ESHS mascot.
What is a tiger?
These adjacent angles have a vertex on a straight line.
What are a linear pair of angles?
Segments, paradoxically, are made up of these.
What are points?
What is "if and only if?"
Equals added to equals are equal.
What is the addition property of equality?
A sandwich shop and/or an underground train.
What is (a) subway?
These two angles sum up to 90 degrees.
What are complementary angles?
Go halfway along a line segment, and you reach this.
What is the midpoint?
Geometric objects having the same shape and size are this.
What is congruent?
An if...then... statement is also known as this.
What is a conditional statement?
Evidence of guilt or innocence or establishing a geometric conclusion.
What is proof?
Two lines that intersect in a 90 degree angle are known as this.
What is perpendicular?
Segments are said to have length but not this.
What is breadth?
This theorem is used to find the length of a line segment or the distance between points on a coordinate plane.
What is the Pythagorean theorem?
If p then q.
not q
Therefore, not p
What is the law of contrapositive?
A linear pair and/or a straight angle.
What equals 180 degrees?