## Lesson 1: Parts of a Circle, Divide a Line into Equal Parts, Enlarging/Reducing a Drawing, Bisect Lines and Angles

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### Introduction

In this opening lesson to this project, students are introduced to the concepts and skills relating to the parts of a circle, dividing a line into equal parts, and bisecting lines and angles. The students will learn these skills and then apply them to drawings they create on assignments on paper.

2 Days

### Industries / Subjects / Grades

##### Industries / Pathways
• Engineering & Architecture
• Engineering Design
• Engineering Technology
• Architectural Design
• Environmental Engineering
• Information and Communication Technologies
• Networking
• 11

### Objectives and Goals. The following objectives relate to board drafting, not Computerized Assisted Drafting (CAD).

#### Related Instructional Objectives (SWBAT...)

• The students will be able to identify the parts of a circle including the following: quadrant, sector, angle, segment, semi-circle, diameter, radius, chord, tangent, circumference, concentric circles and eccentric circles.
• The students will be able to divide a line into equal parts using a ruler.
• The students will be able to bisect any given line.
• The students will be able to bisect an angle.

### Program Information and Grade Levels

##### Industries / Pathways
• Engineering & Architecture
• Engineering Design
• Engineering Technology
• Architectural Design
• Environmental Engineering
• Information and Communication Technologies
• Networking