Solid Geometry · SHS3 Design And Communication…

Lesson notes

Learning Objectives

Indicator: 3.2.2.LI.3 - Design artefact using the concept of curve of intersection.

By the end of the lesson, learners can:

Identify at least three everyday artefacts whose forms depend on the curve of intersection between two solids.
Apply the curve of intersection technique to design a functional or decorative artefact from given specifications.
Construct an accurate working drawing of an artefact showing the curve of intersection between its component solids.
Justify design choices, explaining how the curve of intersection affects the strength, aesthetics, or function of the finished artefact.
Produce a finished artefact (model or detailed drawing) to an acceptable standard of accuracy, assessed against given criteria.

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Curriculum details

Strand: Geometry (Strand 2)
Sub-strand: Solid Geometry (2.2)
Content standard: 3.2.2.CS.1 - 3.2.2.CS.1 Apply the concept of solid geometry in designing. 3.2.2.LO.1 Use the concept of intersection to draw and design artefact.
Indicator: 3.2.2.LI.3 - Design artefact using the concept of curve of intersection.
Suggested placement: Semester 1, Week 19 (Week 19 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 94

Exemplars (from the NaCCA curriculum)

Project-based learning, Activity based learning: In mixed ability groups of no more than four members assist learners to design artefacts using the concept of curve intersection

Assessment (3.2.2.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning.

Teaching and Learning Materials:
- Models
- Charts
- drawing instruments such as set-squares
- protractor
- pair of compasses
- dividers
- reference books
- drawing studio
- access to internet
- LCD Projector