Lesson: Angles of Tangency Mathematics • Third Year of Preparatory School

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In this lesson, we will learn how to identify the angle of tangency in a circle and find its measure using the measure of its subtended arc, inscribed angle, or central angle subtended by the same arc.

Lesson Plan

Students will be able to

find the measure of an angle of tangency in a circle using the measure of arcs and vice versa, including solving linear equations,
find the measure of an angle of tangency in a circle using the measure of an inscribed angle subtended by the same arc and vice versa including solving linear equations,
find the measure of an angle of tangency in a circle using the measure of a central angle subtended by the same arc and vice versa, including solving linear equations,
proving that a ray or a straight line is tangent to a circle passing through some given points using the concept of the angle of tangency.