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UNIT SPECIFIC OBJECTIVES CONTENT TEACHING AND LEARNING ACTIVITIES EVALUATION UNIT 9 (CONTD) PROPERTIES AND CONSTRUCTION OF TANGENTS UNIT 10 INSCRIBED, CIRCUMSCRIBED, ESCRIBED CIRCLES The
student will be able to 1.9.6 explain the practical application of tangency.
1.9.7 explain the principles of blending two arcs.
1.9.8 construct plane figures involving blending of lines and arcs.
1.10.1 differentiate among circumscribed, inscribed escribed circles.
1.10.2 construct circumscribed,
inscribed, escribed circles. Application and principles of tangency: e.g. spanners, anchors and other engineering components. Principles of blending arcs. e.g. spanners and anchors. Plane figures involving blending of lines and arcs. Inscribed, escribed, circumscribed circles.
Construction of inscribed, escribed, circumscribed circles.
Discuss the practical application of tangency with students and assist students to practice other examples in groups. Discuss the principles of blending arcs with students groups. Illustrate the principles involved in constructing plane figures with blending of lines and arcs and assist students to practice. Guide students to calculate the radii of different arcs. Guide students to determine point of contact of the arcs. Using charts show examples of circumscribed,
inscribed, escribed circles, for students to differentiate them. Illustrate the construction of inscribed, escribed, circumscribed circles and assist students to practice.
Students to explain the practical applications of tangency. Students to explain the principles of blending arcs. Students to construct plane figures involving blending of lines
and arcs such as spanners, anchors and openers. Students to indicate point of contact on their drawn figures. Students to explain inscribed, circumscribed and escribed circles. Students to construct inscribed, circumscribed, escribed circles.
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