(True/ False) A chord, which is twice as long as its radius is a diameter of the circle.

(True/ False) A circle is a plane figure.

(True/ False) If AOB is a diameter of a circle and C is a point on the circle, then AC^2 + BC^2 - AB^2 .

The radius of the circle, having centre at (2, 1) , whose one of the chord is a diameter of the circle x^2 + y^2-2x-6y + 6 = 0

(True/ False) Two chords AB and CD of a circle are each at distances 4 cm from the centre. Then AB = CD.

The diameters of two circles are in the ratio of 4 : 3and the sum of the their areas is equal to the area of the circle, whose radius is 5 cm. Find the diameters of the two circles.

(True/ False) A circle has only finite number of equal chords.

True/False: A circle divides the plane into three parts.