Lines, Angles, & Triangles

Front

What is an obtuse triangle?

Back

A triangle that has one obtuse angle.

Front

What is a line segment?

Back

A part of a line that has 2 endpoints.

Front

What are perpendicular lines?

Back

Lines that cross at a 90 degree angle.

Front

What are intersecting lines?

Back

Lines that cross at any angle.

Front

What is a right triangle?

Back

A triangle that has one 90 degree right angle.

Front

What is an acute angle?

Back

An angle that is less than 90 degrees.

Front

What is a straight angle?

Back

An angle that is exactly 180 degrees.

Front

What is a triangle?

Back

A polygon with three sides and three angles.

Front

What are parallel lines?

Back

Lines that never cross and are always the same distance apart.

Front

What is a vertex in a triangle?

Back

A point where two sides of a triangle meet.