i) True, Because all points are equidistant from the centre to the circle.
ii) False, Because circle has infinitely may equal chords can be drawn.
iii) False, Because all three arcs are equal, so there no difference between the major and minor arcs.
iv) True, By the definition of diameter, that diameter is twice the radius.
v) False, Because the sector is the region between two radii and an arc.
vi) True, Because circle is a part of the plane figure.