Geometry Semester 1 Vocab

Front

A statement that is accepted as true without proof.

Back

Postulate

Front

Angles that lie on the same side of the transversal and in corresponding positions.

Back

Corresponding Angles

Front

A statement that has been proved, or can be proved.

Back

Theorem

Front

A triangle that contains one angle whose measure is 90 degrees.

Back

Right Triangle

Front

An example that proves that a conjecture or statement is false.

Back

Counterexample

Front

A polygon with three sides.

Back

Triangle

Front

The sum of the interior angles of a triangle is equal to this number.

Back

180 degrees

Front

A line that intersects two or more lines at different points.

Back

Transversal

Front

Angles that are opposite each other when two lines intersect.

Back

Vertical Angles

Front

A triangle with all sides of different lengths.

Back

Scalene Triangle