Basic Geometric 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

Tags

CCSS.HSG.CO.A.1

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

Tags

CCSS.4.G.A.1

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

Tags

CCSS.HSG.CO.A.1

What is space?

• An infinite extension of a 3 dimensional region

• A straight path that extends infinitely in both directions

• A flat surface that extends infinitely in all directions

• A set of points

Tags

CCSS.2.G.A.1

CCSS.1.G.A.1

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

Tags

CCSS.4.G.A.1

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

Tags

CCSS.4.G.A.1

What is an angle?

• A dot

• 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 intersecting lines?

• Lines that do not cross each other

• A part of a line having 2 endpoints

• A collection of points along a straight path that extends indefinitely in both directions

• Lines that cross each other

Tags

CCSS.4.G.A.1

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

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

What are perpendicular 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

Tags

CCSS.HSG.CO.A.1