Lesson 6

Workshop: Angles and Lines

Est. Class Sessions: 1
X

Mathematical Standards

4.MD.C
Geometric measurement: understand concepts of angle and measure angles. (4.MD.C.7)
4.G.A
Draw and identify lines and angles, and classify shapes by properties of their lines and angles. (4.G.A.1, 4.G.A.2)

Standards for Mathematical Practice

MP2.
Reason abstractly and quantitatively.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.

Students practice the skills and concepts covered in Lessons 1–5. They practice identifying acute, obtuse, and right angles; drawing and naming lines, rays, and line segments; and estimating angle size using benchmark angles. They estimate, measure, and then find the sum of the measures of the angles meeting at a point (vertex) in tessellations.

Content in this Lesson

  • Classifying acute, obtuse, and right angles [E2].
  • Identifying and naming rays, line segments, and lines [E3].
  • Drawing rays, line segments, and lines [E3].
  • Drawing and identifying intersecting, perpendicular, and parallel lines [E4].
  • Estimating the size of angles using benchmark angles of 90°, 180°, and 360° [E11].
  • Estimating the size of angles in degrees [E11].

Daily Practice and Problems Q–R

Q. Missing Number

R. What Time Is It?

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book
  • Practice with Angles and Lines
    Self-Check:
    Questions 1–2, 9, and 18–21
    Pages 335, 339, and 345, respectively

Teacher Resources

 Teacher Guide - digital

Supplies for Students

ruler
protractor
blank paper
1 set of Power Polygons™ (Shapes A–O)

Materials for the Teacher

Display of Jacob's Ladder Quilt (Student Guide) Page 405
Display of the four quilt patterns (Student Guide) Page 406
Math Facts Class Record

Materials Preparation

Find Examples of Geometric Patterns. To enrich the activity about quilts in Part 1, find books on quilts, Islamic art, Native pottery, or other art genres that utilize geometric patterns. Find a quilt with a geometric pattern and bring it to class.

Assessment in this Lesson

Assessment Expectation Assessed

Practice with Angles and Lines
Self-Check: Questions 1–2, 9, and 18–21
Student Activity Book Pages 335, 339, and 345, respectively
E1.
Use addition and subtraction to find unknown angles.
E2.
Classify acute, obtuse, and right angles.
E3.
Identify points, rays, lines, and line segments.
E4.
Draw and identify intersecting, perpendicular, and parallel lines.
E11.
Estimate the size of an angle using 90°, 180°, and 360° as benchmarks.