Geometry Terms

What is a point?

• A dot

• A straight path that extends infinitely in both directions

• A flat surface that extends infinitely in all directions

• When you gesture towards something with your finger

What is a line?

• A dot

• A straight path that extends infinitely in both directions

• A flat surface that extends infinitely in all directions

• A set of points

What is a plane?

• A dot

• A straight path that extends infinitely in both directions

• A flat surface that extends infinitely in all directions

• A set of points

What is a ray?

• A part of a line having 2 endpoints.

• A straight path that extends infinitely in both directions

• A part of a line having only one endpoint

• A set of points

What is a line segment?

• A part of a line having 2 endpoints.

• A straight path that extends infinitely in both directions

• A flat surface that extends infinitely in all directions

• Consists of two rays that have a common endpoint called the vertex

What are parallel lines?

• Lines that do not intersect each other

• Lines that intersect each other at a right angle

• Lines that intersect each other at an acute angle

• Lines that intersect each other at any angle

What is a straight angle?

• An angle less than 90 degrees

• An angle equal to 90 degrees

• An angle greater than 90 degrees

• An angle equal to 180 degrees

What is an acute angle?

• An angle less than 90 degrees

• An angle equal to 90 degrees

• An angle greater than 90 degrees

• An angle equal to 180 degrees

What are supplementary angles?

• Angles that add up to 90 degrees

• Angles that add up to 180 degrees

• Angles that add up to 270 degrees

• Angles that add up to 360 degrees

What are vertical angles?

• Angles that add up to 90 degrees

• Angles that add up to 180 degrees

• Angles that are opposite each other when two lines intersect

• Angles that are adjacent to each other