McGraw Hill Glencoe Geometry, 2012
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McGraw Hill Glencoe Geometry, 2012 View details
1. Circles and Circumference
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Exercise 2 Page 701

Before identifying teach feature of the graph, let's review some important definitions about circles.

  • Radius: A segment whose endpoints are the center and any point on the circumference of a circle.
  • Chord: A segment whose endpoints are on the circumference of a circle.
  • Diameter: A chord that contains the center of the circle.

Now, consider the given diagram.

Chord

We can see that is a segment that intersects the circle and its two endpoints, and are on the circumference. Therefore, it is a chord.

Diameter

is a chord, since it intersects the circle and its two endpoints, and are on the circumference. But also crosses the center Therefore, it is a diameter.

Radius

According to the definitions, is a radius, since its a segment whose endpoints are the center and a point on the circumference.