## Ch. 3 Perpendicular and Parallel Lines

### 3.1 Lines and Angles

At the end of this section, you will be able to:

• Identify relationships between lines.
• Identify angles formed by transversals.

### 3.2 Proof and Perpendicular Lines

At the end of this section, you will be able to:

• Write different types of proof.
• Prove results about perpendicular lines.

### 3.3 Parallel Lines and Transversals

At the end of this section, you will be able to:

• Prove and use results about parallel lines and transversals.
• Use properties of parallel lines to solve real-life problems.

### 3.4 Proving Lines Are Parallel

At the end of this section, you will be able to:

• Prove that two lines are parallel.
• Use properties of parallel lines to solve real-life problems.

### 3.5 Using Properties of Parallel Lines

At the end of this section, you will be able to:

• Use properties of parallel lines in real-life situations.
• Construct parallel lines using straightedge and compass.

### 3.6 Parallel Lines in the Coordinate Plane

At the end of this section, you will be able to:

• Find slopes of lines and use slope to identify parallel lines in a coordinate plane.
• Write equations of parallel lines in a coordinate plane.

### 3.7 Perpendicular Lines in the Coordinate Plane

At the end of this section, you will be able to:

• Use slope to identify perpendicular lines in a coordinate plane.
• Write equations of perpendicular lines.