Geometry Basics

Front

Perpendicular lines

Back

Lines that intersect at a 90 degree angle.

Front

Parallel lines

Back

Lines that have the same slope and never intersect.

Front

Transversal

Back

Any line that crosses at least 2 parallel lines.

Front

Slope of line

Back

(y2-y1)/(x2-x1)

Front

Angle

Back

An angle is formed when two lines or line segments intersect.

Front

Acute angle

Back

Any angle that is less than 90 degrees.

Front

Complementary angle

Back

Either of 2 angles that when added create a sum of 90 degrees.

Front

Obtuse angle

Back

Any angle that is more than 90 degrees and less than 180 degrees.

Front

Right angle

Back

An angle that is 90 degrees.

Front

Congruent angles

Back

Angles that have the same angle measures.