Lines, Angles, and Triangles

Front

What is the geometric term for a point where two rays meet?

Back

vertex

Front

What are the attributes of a right triangle?

Back

2 acute angles, 1 right angle

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What are parallel lines?

Back

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

Front

What are the attributes of an obtuse triangle?

Back

1 obtuse angle, 2 acute angles.

Front

What is an acute angle?

Back

An angle that is less than 90 degrees.

Front

What is a right angle?

Back

An angle that is exactly 90 degrees.

Front

What is an obtuse angle?

Back

An angle that is greater than 90 degrees but less than 180 degrees.

Front

What are intersecting lines?

Back

Lines that cross each other at one point.

Front

What is a ray?

Back

A part of a line that starts at a point and extends infinitely in one direction.