Page 1 Mark the correct alternative in each of the following: 1. A circle of radius r cm has diameter of length (a) r cm (b) 2r cm (c) 4r cm (d) r/2 cm Solution: The option (b) is the correct answer. A circle of radius r cm has diameter of length 2r cm. 2. A chord of a circle passing through its centre is equal to its (a) radius (b) diameter (c) circumference (d) none of these Solution: The option (b) is the correct answer. A chord of a circle passing through its centre is equal to its diameter. 3. The total number of diameters of a circle is (a) 1 (b) 2 (c) 4 (d) uncountable number Solution: The option (d) is the correct answer. The total number of diameters of a circle is uncountable number. 4. By joining any two points on a circle, we obtain its (a) radius (b) diameter (c) chord (d) circumference Solution: The option (c) is the correct answer. By joining any two points on a circle, we obtain its chord. 5. The longest chord of a circle is equal to its (a) radius (b) diameter (c) circumference (d) perimeter Solution: Page 2 Mark the correct alternative in each of the following: 1. A circle of radius r cm has diameter of length (a) r cm (b) 2r cm (c) 4r cm (d) r/2 cm Solution: The option (b) is the correct answer. A circle of radius r cm has diameter of length 2r cm. 2. A chord of a circle passing through its centre is equal to its (a) radius (b) diameter (c) circumference (d) none of these Solution: The option (b) is the correct answer. A chord of a circle passing through its centre is equal to its diameter. 3. The total number of diameters of a circle is (a) 1 (b) 2 (c) 4 (d) uncountable number Solution: The option (d) is the correct answer. The total number of diameters of a circle is uncountable number. 4. By joining any two points on a circle, we obtain its (a) radius (b) diameter (c) chord (d) circumference Solution: The option (c) is the correct answer. By joining any two points on a circle, we obtain its chord. 5. The longest chord of a circle is equal to its (a) radius (b) diameter (c) circumference (d) perimeter Solution: The option (b) is the correct answer. The longest chord of a circle is equal to its diameter. 6. How many circles can be drawn to pass through two given points? (a) 1 (b) 2 (c) 0 (d) As many as possible Solution: The option (d) is the correct answer. Many circles can be drawn to pass through two given points. 7. How many circles can be drawn to pass through three non-collinear points? (a) 1 (b) 2 (c) 0 (d) As many as possible Solution: The option (a) is the correct answer. Only 1 circle can be drawn to pass through three non-collinear points.Read More

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