• ### C.1. Angles

3. #### C.1.1. Defining an Angle

1. C.1.1.O. Overview
2. C.1.1.1. Determine whether an angle is formed
3. C.1.1.2. Count the angles in a closed figure
4. C.1.1.3. Compare angles
4. #### C.1.2. Measuring an Angle

1. C.1.2.O. Overview
2. C.1.2.1. Using a protractor
3. C.1.2.2. Measure the angle using a protractor
4. C.1.2.3. Identify the angle given the measure
5. #### C.1.3. Classifying an Angle as Right, Acute, Obtuse, or Straight

1. C.1.3.O. Overview
2. C.1.3.1. Classify angles as right, acute, or obtuse
3. C.1.3.2. Count right angles in a diagram
4. C.1.3.3. Count right angles in a turn
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• ### C.2. Perpendicular and Parallel Lines I

3. #### C.2.1. Perpendicular Lines

1. C.2.1.O. Overview
2. C.2.1.1. Determine whether lines are perpendicular
3. C.2.1.2. Identify perpendicular lines
4. C.2.1.3. Count the number of perpendicular lines
4. #### C.2.2. Parallel Lines

1. C.2.2.O. Overview
2. C.2.2.1. Determine whether lines are parallel
3. C.2.2.2. Identify parallel lines
4. C.2.2.3. Count the number of parallel lines
5. C.2.2.4. Parallel Lines cut by a traversal
6. C.2.2.5. Identify parallel and perpendicular lines
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• ### C.5. Angles on a Line and at a Point

3. #### C.5.1. Complementary Angles

1. C.5.1.O. Overview
2. C.5.1.1. Find the measure of an angle using given information
3. C.5.1.2. Find the measure of an angle using algebra
4. #### C.5.2. Angles on a Line

1. C.5.2.O. Overview
2. C.5.2.1. Find the measure of an angle on a line using given information (1 step)
3. C.5.2.2. Find the measure of an angle on a line using given information (2 steps)
4. C.5.2.3. Find the measure of an angle on a line using algebra
5. #### C.5.3. Angles at a Point

1. C.5.3.O. Overview
2. C.5.3.1. Find the measure of an angle at a point using given information (1 step)
3. C.5.3.2. Find the measure of an angle at a point using given information (2 steps)
4. C.5.3.3. Find the measure of an angle at a point using algebra
5. C.5.3.4. Find the measure of an angle created by a divided circle
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• ### C.6. Vertical Angles & Mixed Up

3. #### C.6.1. Vertical Angles

1. C.6.1.O. Overview
2. C.6.1.1. Find the measure of an angle using the vertical angle
3. C.6.1.2. Find the measure of angles formed by intersecting lines
4. C.6.1.3. Find the measure of angles formed by intersecting lines (multi-step)
4. #### C.6.2. Combining Complementary and Vertical Angles with Angles at a Point or on a Line

1. C.6.2.O. Overview
2. C.6.2.1. Find and compare angle measurements at a point and on a line
3. C.6.2.2. Finding missing angle challenge problems – Level 1
4. C.6.2.3. Finding missing angle challenge problems – Level 2
5. C.6.2.4. Finding missing angle challenge problems – Level 3
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• ### C.3. Vertical and Horizontal Lines

3. #### C.3.1. Vertical and Horizontal Lines

1. C.3.1.O. Overview
2. C.3.1.1. Identify vertical and horizontal lines
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• ### C.4. Cardinal and Secondary Directions

3. #### C.4.1. Cardinal and Secondary Directions

1. C.4.1.O. Overview
2. C.4.1.1. Describe direction given a degree rotation
3. C.4.1.2. Describe relative position of objects
4. C.4.1.3. Find the direction after a turn
5. C.4.1.4. Find the direction after multiple turns
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