Title: Introduction to Straightedge and Compass

Objective: By the end of this lesson, students will be able to draw a circle, draw a line segment, and transfer a distance using a straightedge and compass.

Warm-up Activity: 1. Begin the lesson by asking students if they have ever used a straightedge or compass before. Allow them to share their experiences and discuss the purpose of these tools. 2. Introduce the terms “straightedge” and “compass” and explain their functions. Emphasize that a straightedge is used to create straight lines or line segments, while a compass is used to draw circles and transfer distances. 3. Display a straightedge and compass and demonstrate how to use each tool. Show students how to hold and position the tools correctly.

Main Activity: 1. Review the terms “segment,” “midpoint,” “circle,” “radius,” and “triangle” with the students. Ensure that they understand the definitions and can identify these elements in a geometric figure. 2. Distribute a worksheet or provide individual whiteboards for students to practice using the straightedge and compass. 3. Instruct students to complete the following tasks: a. Draw a circle with a radius of 3 cm. b. Draw a line segment AB with a length of 5 cm. c. Transfer the length of AB to create a line segment CD starting from point C. d. Draw a triangle with side lengths of 4 cm, 6 cm, and 8 cm. e. Find the midpoint of line segment AB and label it as M. f. Draw a circle with center M and a radius of 2 cm. 4. Circulate the classroom to provide assistance and check for understanding. Encourage students to ask questions if they encounter difficulties. 5. Once students have completed the tasks, review their work as a class. Discuss any common mistakes or misconceptions and provide feedback.

Closure: 1. Summarize the key concepts covered in the lesson, emphasizing the importance of the straightedge and compass in geometry. 2. Ask students to reflect on their learning and share any insights or challenges they encountered during the activity. 3. Conclude the lesson by highlighting the practical applications of using a straightedge and compass in real-life situations, such as construction and design.

Extension Activity (Optional): For students who finish early or need an additional challenge, provide more complex geometric figures to construct using the straightedge and compass. Encourage them to explore different properties and relationships within these figures.

Assessment: Assess students’ understanding through their completion of the main activity tasks. Look for accuracy in drawing circles, line segments, and transferring distances. Additionally, observe their ability to identify and apply the terms reviewed in the warm-up activity. Provide feedback and support as needed.