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6TA Circles Review

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  • Determine the area of a quarter-circle with a radius of 5 meters.
    Answer: 9.82 m²
  • What is the formula to find the circumference of a circle?
    Answer: C = 2πr or C = πd
  • If the area of a circle is 50.24 square centimeters find its diameter.
    Answer: 4 cm
  • Find the area of a semi-circle with a radius of 7 cm.
    Answer: 77 cm²
  • What is the relationship between the diameter and the circumference of a circle?
    Answer: C = πd
  • Find the area of a circle with a radius of 6 cm.
    Answer: 113.10 cm²
  • Explain what a quarter-circle is.
    Answer: One-fourth of a circle
  • Calculate the perimeter of a shape made up of four quarter-circles with a common center.
    Answer: 3.14 times the radius of one quarter-circle.
  • Explain how the radius and the area of a circle are related.
    Answer: The area is proportional to the square of the radius (A ∝ r²).
  • Determine the circumference of a semi-circle with a diameter of 16 meters.
    Answer: 25.12 meters
  • If the area of a semi-circle is 28.26 square centimeters find its diameter.
    Answer: 6 cm
  • If the radius of a quarter-circle is 9 cm find its circumference.
    Answer: 14.13 cm
  • If the circumference of a circle is 18.84 cm what is its diameter?
    Answer: 6 cm
  • Determine the area of a circle with a diameter of 10 meters.
    Answer: 78.54 m²
  • A circular garden has a circumference of 36 meters. Find the radius of the garden
    Answer: 5.73 meters
  • How does the area of a semi-circle differ from the area of a full circle with the same radius?
    Answer: The area of a semi-circle is half that of a full circle.
  • What is the formula to find the area of a circle?
    Answer: A = πr²
  • Explain the relationship between the radius and the diameter of a semi-circle.
    Answer: The radius is half the length of the diameter in a semi-circle.
  • If the area of a circle is 154 square centimeters find its radius.
    Answer: 7 cm
  • A circular pond has an area of 78.5 square meters. Find the radius of the pond.
    Answer: 5 meters
  • Calculate the area of a circle with a radius of 3.5 cm.
    Answer: 38.48 cm²
  • If the diameter of a semi-circle is 12 cm what is the radius?
    Answer: 6 cm
  • Determine the circumference of a circle with a diameter of 14 meters.
    Answer: 43.96 meters
  • If the area of a quarter-circle is 19.63 square centimeters find its radius.
    Answer: 2.80 cm
  • If the circumference of a circle is 31.4 cm what is its radius?
    Answer: 5 cm
  • A semi-circular garden has a circumference of 22 meters. Calculate its radius.
    Answer: 3.50 meters
  • If the radius of a circle is 5 cm what is its circumference?
    Answer: 31.4 cm
  • Calculate the circumference of a circle with a radius of 8.5 cm.
    Answer: 53.38 cm
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