1) Longest chord of the circle a) Diameter b) arc c) semicircle d) radius 2) any part of the circumference a) circumference b) Diameter c) radius d) arc 3) half of a circle a) radius b) semicircle c) arc d) Diameter 4) perimeter of the circle a) Diameter b) semicircle c) arc d) circumference 5) line segment joining centre to any point on the circle a) semicircle b) Diameter c) circumference d) radius

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