Geometry Basic

Front

What kind of angle is greater than 90 degrees but less than 180 degrees?

Back

Obtuse angle

Front

What is a part of a line that has a starting point but no endpoint?

Back

Ray

Front

What do you call two lines that never meet and are always the same distance apart?

Back

Parallel Lines

Front

What do you call two lines that intersect at a right angle (90 degrees)?

Back

Perpendicular Lines

Front

What kind of angles are less than 90 degrees?

Back

Acute angles

Front

What is a straight line that has two endpoints?

Back

Line segment

Front

What do you call an angle that measures exactly 90 degrees?

Back

Right angle

Front

What is the term for angles that add up to 180 degrees?

Back

Supplementary angles

Front

What do you call angles that are opposite each other when two lines intersect?

Back

Vertical angles

Front

What is the term for a closed figure with three sides?

Back

Triangle