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Definitions
Theorems
More Theorems!
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Trivia
100
A line that passes through two parallel lines.

What is a transversal?

100

This theorem proves that triangles with two sides and their included angles congruent are congruent.

What is SAS?

100

This theorem proves that when two lines are parallel, the angles inside the lines and on the same side of the transversal are supplementary.

What is same-side interior angles theorem?

100
An isosceles triangle is also equilateral.

What is sometimes?

100

The only even prime number.

What is 2?

200

The triangle center made by the intersection of the perpendicular bisectors.

What  is the circumcenter?

200

This theorem proves that two angles opposite each other are always congruent.

What is the vertical angles theorem?

200

This theorem proves that a triangle is either acute or obtuse.

What is the Pythagorean theorem corollaries?

200

The diagonals of a rectangle (not a rhombus or square) are perpendicular bisectors.

What is never?

200

The only geometric figure that has no dimensions.

What is a point?

300

A 2 dimensional figure that has one endpoint and continues in one direction forever.

What is a ray?

300

This theorem proves that the sum of the squares of the legs are is equal to the square of the hypotenuse.

What is the Pythagorean Theorem?

300

This theorem proves that a side or angle is congruent if two triangles are already proven to be congruent.

What is CPCTC?

300
The diameter of a circle is the longest chord.

What is always?

300

This is the type of geometry we have been studying all year.

Euclidean           Non-Euclidean          Differential

What is Euclidean?

400
The set of all points equidistant from a given point.

What is a circle?

400

This theorem proves that the sum of the angles in a triangle is 180 degrees.

What is the triangle angle sum theorem?

400

This theorem proves that two lines are parallel if the angles on the outside of the lines and on opposite sides of the transversal are congruent.

What is the converse of the alternate interior angles theorem?

400
Tan(A) = sin(A)/cos(A)

What is always?

400

What country did geometry originate in?

What is Egypt?

500

A quadrilateral with at least one pair of parallel sides.

What is a trapezoid?

500

This theorem proves that if the base angles is a triangle are congruent, then the triangle is isosceles.

What is the converse of the isosceles triangle theorem?

500
This property proves that if a=b and b=c, then a=c.

What is the transative property?

500

The side lengths of similar triangles are congruent.

What is sometimes?

500

How many Marvel movies have been released to date. (This does not include the new Spiderman!)

What is 22?