Chord of a Circle

Chords, intercepted Arcs & Theorems

The perpendicular bisector of a chord

Practice Problems

Problem 1

How long is chord DU?

Since the blue line is the perpendicular bisector of DU, DU = 5+5=10

Problem 2

What is the measure of the radius of the circle on the left?

Step 1

r =7.8

Problem 3

In only one of the two circles is the blue line a perpendicular bisector of chord DU. Which circle and why?

back to Circle Formulas next to Arcs and Angles

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