Question

Which of the following is/are incorrect?

• A. The perpendicular drawn from the centre of the circle to a chord bisects the chord.
• B. Congruent arcs of a circle subtend equal angles at the centre.
• C. Congruent arcs of a circle subtend right angles at the centre.
• D. Chords equidistant from the centre of a circle are equal in length.

Answer 1

The correct option is C

Congruent arcs of a circle subtend right angles at the centre.

Step-1: Explanation for correct option:

Option(C) congruent arcs of a circle subtend right angles at the centre.
The angle subtended by a chord of a circle at its centre is equal to the angle subtended by the corresponding (minor) arc at the centre..

Hence congruent arcs of a circle subtend equal angles at the centre but not right angles always.

Hence, option (c) is correct choice.