# Contents

1. Section A: Points, Lines, Segments, Rays, and Angles
1. Warm-up: Notice and Wonder: String Art
2. 1.1: Do You See What I See?
3. 1.2: Lines and Line Segments
1. Warm-up: Number Talk: Finding Differences
2. 2.1: Card Sort: Who Am I?
3. 2.2: Make Some Shapes
1. Warm-up: How Many Do You See: A Curious Figure
2. 3.1: Four Lines
3. 3.2: To Cross or Not to Cross
1. Warm-up: Which One Doesn’t Belong: Four-sided Shapes
2. 4.1: Spot Lines and Line Segments
3. 4.2: Draw and Design with Lines
1. Warm-up: Notice and Wonder: A Wall of Clocks
2. 5.1: Tricky Figures
3. 5.2: Angles or Not Angles?
4. 5.3: Discover Angles
5. Section A Summary
6. Section A Practice Problems
2. Section B: The Size of Angles
1. Warm-up: Which One Doesn’t Belong: Angles
2. 6.1: Card Sort: Angles
3. 6.2: Order Angles
1. Warm-up: Notice and Wonder: Two Sets of Angles
2. 7.1: Draw Angles Andre’s Way
3. 7.2: Compare Angles on the Clock
1. Warm-up: What Do You Know about 360?
2. 8.1: A Full Turn
3. 8.2: Make a Measuring Tool
1. Warm-up: True or False: There's Something about 45
2. 9.1: How Large is a 1^\circ Angle?
3. 9.2: Use a Protractor
1. Warm-up: Number Talk: Quotients
2. 10.1: Angles Here, There, Everywhere
3. 10.2: A Folding Challenge
1. Warm-up: Estimation Exploration: Long Hand and Short Hand
2. 11.1: Draw These Angles
3. 11.2: Angles Made to Order
4. Section B Summary
5. Section B Practice Problems
3. Section C: Angle Analysis
1. Warm-up: Number Talk: Fractions of 120 and 360
2. 12.1: Sorting Angles
3. 12.2: What is It, Really?
4. 12.3: Small Angles, Large Angles
1. Warm-up: Notice and Wonder: Corner Pieces
2. 13.1: How Big Are These Angles?
3. 13.2: Angles in a Kite
1. Warm-up: Which One Doesn’t Belong: Time After Time
2. 14.1: Draw a Clock
3. 14.2: Tick Tock
1. Warm-up: How Many Do You See: Obtuse Angles