Topic A: Lines and Angles  

Lesson 1:  Identify and draw points, lines, line segments, rays, and angles and recognize them in various contexts and familiar figures.  

Lesson 2:  Use right angles to determine whether angles are equal to, greater than, or less than right angles. Draw right, obtuse, and acute angles.   

Lesson 3: Identify, define, and draw perpendicular lines.  

Lesson 4: Identify, define, and draw parallel lines. 

Topic B: Angle Measurement 

Lesson 5:  Use a circular protractor to understand a 1-degree angle as 1/360 of a turn. Explore benchmark angles using the protractor. 

Lesson 6:  Use varied protractors to distinguish angle measure from length measurement. 

Lesson 7:  Measure and draw angles. Sketch given angle measures and verify with a protractor. 

Lesson 8:  Identify and measure angles as turns and recognize them in various contexts. 

Topic C: Problem Solving with the Addition of Angle Measures

Lesson 9:  Decompose angles using pattern blocks.  

Lesson 10:  Use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.  

Lesson 11:  No IDL. 

Topic D: Two-Dimensional Figures and Symmetry 

Lesson 12:  Recognize lines of symmetry for given two-dimensional figures; identify line-symmetric figures and draw lines of symmetry. 

Lesson 13:  Analyze and classify triangles based on side length, angle measure or both.  

Lesson 14:  Define and construct triangles from given criteria. Explore symmetry in triangles. 

Lesson 15:  Classify quadrilaterals based on parallel and perpendicular lines and the presence or absence of angles of a specified size. 

Lesson 16: No IDL.