# 3.11 - Points, Lines, Line Segments, Rays and Angles

The student will

• identify and draw representations of points, lines, line segments, rays, and angles.

### BIG IDEAS

• So that I can identify the parts, or components, of plane polygons
• So that I can describe and compare real-world objects that are around me

### UNDERSTANDING THE STANDARD

• A point is an exact location in space. It has no length, width, or height.
• A line is a collection of points extending indefinitely in both directions. It has no endpoints.
• A line segment is part of a line. It has two endpoints and includes all the points between and including those endpoints.
• A ray is part of a line. It has one endpoint and extends indefinitely in one direction.
• An angle is formed by two rays that share a common endpoint called the vertex.  Angles are found wherever lines or line segments intersect.
• Geometric notation to name lines, line segments and rays is included in grade four.

### ESSENTIALS

The student will use problem solving, mathematical communication, mathematical reasoning, connections, and representations to

• Identify examples of points, line segments, rays, angles, and lines.
• Describe endpoints and vertices as they relate to lines, line segments, rays, and angles.
• Draw representations of points, line segments, rays, angles, and lines, using a ruler or straightedge.

### KEY VOCABULARY

Updated: Aug 22, 2018