Angles at the centre of a circle add up to, 180 degrees, 360 degrees, 540 degrees, A radius of a circle is 8 cm. What is its diameter?, 4 cm, 10 cm, 16 cm, A line of symmetry in a circle is a, diameter, radius, circumference, Circles are congruent if their diameters are , different lengths, the same length, long, The perimeter of a circle is also known as its, circumference, radius, diameter, A diameter of a circle is 25 cm. What is its radius?, 12 cm, 12.5 cm, 50 cm, The longest chord of a circle is called its, radius, diameter, circumference, Which word best describes a circle?, plane shape, solid shape, polygon, Each angle in the circle shown measures, 30 degrees, 60 degrees, 90 degrees, How many lines of symmetry are there in a circle?, 2, 4, infinite.

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