Start the theorem
Finish the theorem
It's a . . .
Defining
Logic
100
..., they intersect at exactly one point.
What is if two lines intersect
100
If there is a line and a point not on the line, ...
What is then exactly one plane contains them.
100
A line segment that connects two points on a circle, or a harmonious set of three notes played together.
What is a chord?
100
A triangle where the sides are of three different lengths.
What is a scalene triangle?
100
An "If . . ., Then . . ." statement is called this.
What is a conditional statement?
200
...., then there exists exactly one plane that contains them.
What is If two lines intersect?
200
If two parallel planes are cut by a third plane, ...
What is then the lines of intersection are parallel?
200
A line that touches a circle at only one point, or a completely different line of thought or action.
What is a tangent?
200
A polygon that is both equilateral and equiangular.
What is a regular polygon?
200
If p then q. When p is false, the statement always has this truth value.
What is true?
300
If ..., then the lines are parallel to each other.
What is if they are both perpendicular to the same line?
300
In a plane, if a line is perpendicular to one of two parallel lines, then . . .
What is it is perpendicular to the other one?
300
The locus of points in space that are all equidistant from a central point, or, an area of interest or expertise.
What is a sphere?
300
A polygon in which one or more diagonals contain exterior points.
What is a concave polygon?
300
It forms a logically equivalent statement with the converse.
What is the inverse?
400
If . . . , then they form congruent adjacent angles.
What is if two lines are perpendicular?
400
If two lines form congruent adjacent angles, then . . .
What is they are perpendicular?
400
Something that has length and width but no depth, or, a vehicle for aerial transportation.
What is a plane?
400
A decagon has this many sides.
What is 10?
400
It forms a logically equivalent statement with a conditional statement.
What is the contrapositive?
500
If . . ., then the two angles are congruent.
What is If two angles are complementary (supplementary) to the same angle or to congruent angles?
500
If two angles form a linear pair, then . . .
What is they are supplementary?
500
A figure formed by two rays with a common endpoint, or a particular way of approaching an issue or problem.
What is an angle?
500
Two triangles that have the same three angles are said to be this.
What is similar?
500
You need just one of these to prove that a conjecture is false.
What is a counter example?
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