Lines and Angles

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

Which lines are parallel?

Back

Lines that do not intersect and maintain a constant distance apart.

Front

What is a ray in geometry?

Back

A ray is a line that has one endpoint and extends infinitely in one direction.

Front

What type of triangle has perpendicular sides?

Back

A right triangle has one angle that is exactly 90 degrees, making its sides perpendicular.

Front

What is a line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What are intersecting lines?

Back

Intersecting lines are lines that cross each other at one point.