Lesson 31 - Points, Lines, Rays, and Angles

Oct 1, 2026

Uploaded by jay

Family instructions for Lesson 31, guiding a child’s learning about geometry concepts: points, line segments, lines, rays, and angles. Defines each term clearly, including how line segments, lines, and rays are written and named. Explains parallel lines and perpendicular lines, with reference to right angles. Provides a shared activity for finding real-life examples made from points, lines, rays, and angles, using clue-based descriptions to practice vocabulary and recognition.

LanguageEnglish

CategoryExam

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Points, Lines, Rays, and Angles Vocabulary

Points, Lines, Line Segments, and Rays

Angles, Parallel Lines, and Perpendicular Lines

Points, Lines, Rays, and Angles Activity

Use with Ready Instruction Lesson 31 Dear Family, This week your child is learning about points, lines, rays, and angles. Here are some vocabulary words that tell about the geometry concepts that your child is learning. A point is a single location in space. Point A is shown at the right. A line segment is a straight row of points that starts at one point and ends at another point. Line segment AB is written as ···AB . A line is a straight row of points that goes on forever in both directions. Line AB is k·l written as AB . A ray is a straight row of points that starts at one point and goes on forever in one ·l direction. Ray AB is written as AB . An angle is made up of rays, lines, or line segments that meet at a common point. The angle shown on the right can be named / A, / CAB, or / BAC. Parallel lines are always the same distance apart and never cross. Perpendicular lines cross and form aright angle, or 90° angle. A A B A B A B A B Invite your child to share what he or she knows about points, lines, rays, and angles by doing the following activity together. ©Curriculum Associates, LLC Copying is not permitted. Lesson 31 Points, Lines, Rays, and Angles 347 Authorized for use by school personnel only. This resource expires on 6/30/2022. Points, Lines, Rays, and Angles Activity Do an activity with your child to identify lines, rays, and angles. Together, find examples of real-life objects that are made up of points, lines, rays, and angles. • Give clues to describe the objects to each other without naming the objects. Use some of the geometry vocabulary words that your child is learning about. • Try to guess each object from the other person’s description of it. • Here are some real-life examples you might use: | | | | | | --- | --- | --- | --- | | | | | | --- | --- | --- | A traffic intersection (perpendicular lines) 348 Lesson 31 Points, Lines, Rays, and Angles ©Curriculum Associates, LLC Copying is not permitted. Authorized for use by school personnel only. This resource expires on 6/30/2022.

FAQs

What are the key geometry terms taught in Lesson 31?

Lesson 31 teaches points, line segments, lines, rays, and angles, along with vocabulary for parallel and perpendicular lines.

How are a line segment and a ray written in the lesson?

A line segment is written with endpoints (shown as AB). A ray is written with one endpoint and a ray direction (shown as AB).

What activity should families do with the child?

Do an activity together to identify lines, rays, and angles in real life, describe objects using geometry vocabulary, and try to guess the object from clues.

Oct 1, 2026

Uploaded by jay