Question 1: Calculate the area of a circle with a radius of 3 cm.

Answer: 28.27

Question 2: A circle has an area of approximately 78.54 cm². What is the radius of the circle? (Use π ≈ 3.14)

Answer: 5

Question 3: Construct a circle with a radius of 4 cm and shade the area inside it on the grid.

Answer:

Question 4: What is the circumference of a circle with a radius of 5 cm? (Use π ≈ 3.14)

Answer: 31.4

Question 5: A circular garden has a radius of 6 meters. Calculate its area.

Answer: 113.04

Question 6: A toy wheel has a radius of 10 cm. Find the area of the face of the wheel.

Answer: 314.16

Question 7: A circular pool has an area of 50 m². What is its radius? (Use π ≈ 3.14)

Answer: 4

Question 8: Plot the graph of y = 2x for x values from 0 to 10 on the grid.

Answer:

Question 9: Construct a circle with a radius of 3 cm and then draw a tangent to the circle at a point on its circumference.

Answer:

Question 10: A circle with a radius of 7 inches is cut out from a sheet. Calculate its area.

Answer: 153.94

Question 11: Identify and correct the mistake in this student’s calculation: The area of a circle with radius 4 cm is 50.24 cm².

Answer: Incorrect; area should be 50.24 only if π is approximated as 3.14, but 50.24 is not exact; actual area is 50.27. The error is in rounding or calculation.