8/10/2019 8.1-8.2 Circles III

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Date: 17 July 2009 (Friday) Class: 4S2

Time: 9-9.40am

Learning Area: Circle III

Learning Objective: Understand the concept of tangents to a circle

Learning Outcome: A student is able to:

identify tangents to a circle

make inference that the tangent to a circle is a straight line perpendicular to theradius that passes through the contact point

construct the tangent to a circle passing through a point on the circumference of the

circle and outside the circle.

determine the properties related to two tangents to a circle from a given point

outside the circle

solve problems involving tangents to a circle

Vocabulary: circle, tangent to a circle, circumference, perpendicular, radius

Prior Knowledge and Skills: Students know and understand the concept of circle

Scientific Skills: Observing, comparing, and communicating.

Thinking Skills: Attributing, comparing and contrasting, making conclusion, relating.

Scientific Attitudes and Noble Values: Appreciating the contribution of science and

technology, having critical and analytical thinking, thinking rationallyTeaching Activities:

Discussion on the homework that is given in the previous lesson.

Discussion on the concepts of tangents to a circle

Evaluate students understanding by asking some questions to the students.

Give exercise to students as homework.

Reflection:

Date: 21 July 2009 (Tuesday) Class: 4S2

Time: 11.15am-12.40pm

Learning Area: Circle III

Learning Objective: Understand & use the properties of angle between tangent and

chord to solve problems

Learning Outcome: A student is able to:

identify the angle in the alternate segment which is subtended by the chord through

the contact point of the tangent

verify the relationship between the angle formed by the tangent and the chord with

the angle in the alternate segment which is subtended by the chord

perform calculations involving the angle in alternate segment

solve problems involving tangent to a circle and angle in alternate segment

Vocabulary: chords, alternate segment, major sector, subtended

Prior Knowledge and Skills: Students know and understand the concept of circle

Scientific Skills: Observing, comparing, and communicating.

Thinking Skills: Attributing, comparing and contrasting, making conclusion, relating.Scientific Attitudes and Noble Values: Appreciating the contribution of science and

technology, having critical and analytical thinking, thinking rationally

Teaching Activities:

Discussion on the homework that is given in the previous lesson.

Discussion on the properties of angle between tangent and chord to solve problems.

Evaluate students understanding by asking some questions to the students.

Give exercise to students as homework.

Reflection: