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Circles, Semicircles, and Composite Shapes

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  • What is the circumference?
    69.08 cm
  • Work out the perimeter of the shape.
    12.2476 m
  • The radius of a circle is 5.4 feet. What is its diameter?
    10.8
  • What is the circumference?
    37.68 ft
  • Find the area of the circle. Use 3.14 for the value of π.
    132.665 square feet
  • What is the area of a semicircle with a radius of 7 cm.
    76.93 cm^2
  • What is the area of the shape?
    440 cm^2
  • Find the area of the circle. Use 3.14 for the value of π.
    78.5 square inches
  • What is the perimeter of the semicircle?
    7.71 ft
  • The circumference of a circle is 20 inches. What is the radius of the circle? Use 3.14 for pi (ROUND TO NEAREST TENTHS PLACE)
    3.2
  • A bike wheel has a diameter of 10 inches. What is the circumference of the wheel? Use 3.14 for pi (DO NOT ROUND)
    31.4
  • What is the perimeter of the semicircle?
    15.42 m
  • Work out the area of the shape correct to one decimal place
    1538.6 mm^2
  • A round kiddie pool measures 3 meters from the center to the edge. What is the approximate circumference of the pool? Use 3.14 for pi (ROUND TO NEAREST WHOLE NUMBER)
    19
  • What is the radius of a circle whose diameter is 15 meters?
    7.5
  • What is the approximate circumference of a circle with a diameter of 10? Use 3.14 for pi (DO NOT ROUND)
    31.4
  • Calculate the area of the shape shown.
    45 km^2
  • What is the perimeter of the shape?
    52 cm
  • Find the area of the shape. Remember your units!
    26.1 square yards
  • Calculate the area of the shape shown.
    32 m^2
  • What is the area of a semicircle with a diameter of 42 cm.
    692.37 cm^2
  • Find the diameter of a circle with a circumference of 50 m. Use 3.14 for π. Round your answer to the nearest whole number.
    16 m.
  • Find the approximate circumference of a circle with a radius of 9. Use 3.14 for pi (DO NOT ROUND)
    56.52
  • What is the perimeter of the semicircle?
    5.14 ft
  • What is the circumference?
    47.1 cm
  • Find the area of the circle. Use 3.14 for the value of π.
    452.16 square miles
  • What's name of the centre?
    O is the name centre.
  • Find the area of the shape. Remember your units!
    320 square inches
  • What is the circumference?
    50.24 cm
  • What is the area of a semicircle with a diameter of 18m. (π = 3.14)
    127.17m^2
  • Find the area of the circle. Use 3.14 for the value of π.
    254.34 square inches
  • Find the area of the shape. Remember your units!
    69.8 square inches
  • What is the perimeter of the semicircle?
    102.8 cm
  • A circular swimming pool is being redone. from the center of the pool to the edge is 12 ft. If they want the tile redone around the pool how many feet of tile do they need?
    75.36
  • What is the area of a semicircle with a radius of 28cm.
    1,232 cm^2
  • What is the radius of the circle?
    AO, BO, EO
  • What is diameter of the circle?
    AB
  • Calculate the area of the shape shown.
    33 m^2
  • Find the radius of a circle with a circumference of 13 in. Use 3.14 for π. Round your answer to the nearest whole number.
    2 in.
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