Surface Development (Intersection of Solids) Technical Drawing SS 2 First Term Lesson Notes Week 8

Lesson Plan: Technical Drawing – Week 8

Subject: Technical Drawing

Class: SS 2

Term: First Term

Week: 8

Age: 16-17 years

Topic: Surface Development (Intersection of Solids)

Sub-topic: Construction of Intersections of Prisms, Pyramids, and Cylinder with Prism

Duration: 80 minutes

Behavioral Objectives:

By the end of the lesson, students should be able to:

1. Construct the intersection of two prisms of different diameters.
2. Construct the intersection of two pyramids.
3. Construct the intersection of a cylinder and a prism.

Keywords:

Intersection, prism, pyramid, cylinder, construction

Set Induction:

Begin the class with a discussion on the importance of understanding the intersections of solids in technical drawing and its practical applications in real-life scenarios.

Entry Behaviour:

Students have learned the basics of surface development and the construction of intersections of various solids.

Learning Resources and Materials:

• Drawing instruments (protractor, compass, T-square, set square, divider, scale, French curve, straight edge)
• Drawing board and paper
• Charts and posters showing intersections of solids

Building Background/Connection to Prior Knowledge:

Discuss how previous lessons on surface development and intersections are foundational to the current lesson.

Embedded Core Skills:

• Critical thinking and problem solving
• Communication and collaboration
• Leadership and personal development

Learning Materials:

• Lagos State Scheme of Work for Technical Drawing
• Drawing manuals and textbooks

Instructional Materials:

• Protractor, compass, T-square, set square, divider, scale, French curve, straight edge
• Drawing board, drawing paper

Content:

1. Intersection of Two Prisms of Different Diameters:
   • Begin by drawing the base of each prism.
   • Use projection lines to find the points of intersection.
   • Connect the points to form the intersection line.
2. Intersection of Two Pyramids:
   • Draw the bases of the two pyramids.
   • Project lines from the apex of each pyramid to the base of the other.
   • Identify the intersection points and connect them.
3. Intersection of a Cylinder and a Prism:
   • Draw the base of the cylinder and the base of the prism.
   • Use projection lines to find the intersection curve between the two shapes.
   • Connect the intersection points to form the curve.

Evaluation:

Fill-in-the-Blank Questions:

1. The intersection of two prisms results in a ________.
   a) Line
   b) Curve
   c) Plane
   d) Point
2. The base of a prism is a ________.
   a) Circle
   b) Rectangle
   c) Triangle
   d) Sphere
3. The intersection of a cylinder and a prism forms a ________.
   a) Line
   b) Point
   c) Curve
   d) Plane
4. A pyramid has a ________ as its base.
   a) Circle
   b) Rectangle
   c) Triangle
   d) Square
5. The projection lines help in finding the ________ points.
   a) Intersection
   b) Base
   c) Apex
   d) Side
6. The apex of a pyramid is ________ from its base.
   a) Distant
   b) Close
   c) Midway
   d) Adjacent
7. The intersection of solids is important for ________.
   a) Decoration
   b) Design
   c) Entertainment
   d) Art
8. The curve of intersection is ________.
   a) Straight
   b) Bent
   c) Curved
   d) Zigzag
9. A cylinder has a ________ surface.
   a) Curved
   b) Flat
   c) Uneven
   d) Textured
10. Two pyramids intersect at their ________.
    a) Bases
    b) Sides
    c) Apexes
    d) Midpoints

Class Activity Discussion:

1. What is the significance of understanding the intersection of solids?
2. How can projection lines help in constructing intersections?
3. Explain the steps involved in finding the intersection of two prisms.
4. What are some real-world applications of intersection of solids?
5. Describe the process of constructing the intersection of a cylinder and a prism.

Presentation:

Step 1: The teacher revises the previous topic on intersections of cylinders and cones.

Step 2: The teacher introduces the new topic on intersections of prisms, pyramids, and cylinders with prisms.

Step 3: The teacher allows the students to demonstrate the construction of these intersections and corrects them where necessary.

Teacher’s Activities:

• Explain the steps for constructing intersections.
• Demonstrate each step on the board.
• Supervise students as they practice the constructions.

Learners’ Activities:

• Follow the teacher’s demonstration.
• Practice constructing the intersections in pairs or small groups.
• Ask questions and seek clarifications where needed.

Assessment:

Evaluation Questions:

1. Describe the steps to construct the intersection of two prisms of different diameters.
2. How do you construct the intersection of two pyramids?
3. Explain the process of finding the intersection of a cylinder and a prism.
4. What role do projection lines play in constructing intersections?
5. Why is it important to understand the intersections of solids in technical drawing?
6. What is the difference between the intersection of prisms and the intersection of pyramids?
7. Describe a practical application of intersecting solids.
8. How can errors in projection lines affect the final construction of intersections?
9. What tools are essential for constructing intersections of solids?
10. Explain how you would verify the accuracy of your constructed intersections.

Conclusion:

The teacher goes around to mark the students’ work, provides feedback, and makes necessary corrections to ensure proper understanding.

More Useful Links:

• Types of Pictorial Drawings and Their Applications Technical Drawing SS 2 First Term Lesson Notes Week 9
• Constructing and Converting Views Technical Drawing SS 2 First Term Lesson Notes Week 10 and 11