Multiple choice

Draw a circle with centre O and radius $2.5$cm. Draw a chord $AB$ passing through its centre. The $m\angle AOB$ is

  1. $180^o$
  2. $270^o$
  3. $90^o$
  4. $0^o$
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A Correct answer
Explanation

A chord passing through the center of a circle is a diameter. The angle subtended by a diameter at the center is 180 degrees.

AI explanation

A chord that passes directly through the center of a circle is defined as a diameter. The two radii extending from the center to the endpoints of this diameter form a straight line, which creates an angle of 180 degrees.

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