Recall that two circles are congruent if they have the same radii. Proe that equal chords of congruent circles subtend equal angles at their centres.

Prove that if chords f congruent circles subtend equal angles at their centres, then the chords are equal.

Prove that the line segment joining the centres of two intersecting circles subtends equal angles at the two points of intersection.

In the figure, which circles are congruent to the circle A?

Prove that the tangent drawn at the ends of chord of a circle make equal angle with the chord.

Two matrices are equal if they have same number of rows and same number of columns .

The radius of reference circle is equal to the……….of the oscillator.

Calculate the length of the arc of a circle of radius 31.0 cm which subtends an angle of (pi)/(6) at the centre.

In the circle of 5cm.radius, what is the length of the arc which subtends and angle of 33^(@)15' at the centre.

State whether each of the following statements is true or false : If the areas of two sectors of two different circles are equal, the lengths of their corresponding arcs are equal.