Chord properties

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Introduction
Lessons
1. What is a chord?
2. What is a tangent?
1. What are the properties of a chord?
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Examples
Lessons
1. If AC is 4 cm and BD is 15 cm, what is the diameter of the circle?

1. Zoe wants to set up her round dining table by putting a candle in the centre of it. How can she do that by using a tangent? Explain your answer with a diagram.
1. Below is a segment of a circle, and A is the center of the circle. The radius is 15 cm, BC is 7.5 cm, and DE is 24 cm.

Determine.
1. $\angle$CED
2. CE
3. BE
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Topic Notes
In a circle, when a line passes through the center of the circle and is perpendicular to a chord, the line will bisect the chord. In other words, the perpendicular bisector of a chord always passes through the center of the circle.