Circle - 7th grade (12y) - math problems

Number of examples found: 158

  • Diameter to area
    circle_eq_1 Find the area of a circle whose diameter is 26cm.
  • Circle - easy 2
    circle_3 The circle has a radius 6 cm. Calculate:
  • Chord
    chord_1 Point on the circle is the end point of diameter and end point of chord length of radius. What angle between chord and diameter?
  • Pipe cross section
    pipe1 The pipe has an outside diameter 1100 mm and the pipe wall is 100 mm thick. Calculate the cross section of this pipe.
  • Circle - simple
    colorful-circle Calculate the area of a circle in dm2, if its circumference is 31.4 cm.
  • Wheel
    wheel_1 What is the wheel diameter if on the 0.38 km track turns 128 times?
  • Arc
    circle_2 The length of the circle is 41 amd arc length of the circle 9. What is the magnitude of the angle of this arc?
  • Squaring the Circle
    SquareCircle Calculating side of the square with the same area as the circle of radius 18.
  • Wheel
    bicycle_1 Diameter of motocycle wheel is 52 cm. How many times rotates wheel on roand long 2 km?
  • Circle simple
    circles_3 Circumference of a circle is 6.28. What is the area of the circle?
  • Bicycle wheel
    wheel_2 Bicycle wheel diameter is 62 cm. How many times turns the bicycle on the road 1 km long?
  • Circle from string
    motuz Martin has a long 628 mm string . He makes circle from it. Calculate the radius of the circle.
  • Annulus
    medzikruzie Calculate the area of two circles annulus k1 (S, 3 cm) and k2 (S, 5 cm).
  • Percentage of waste
    14 In a square plate with side 75 cm we cut 4 same circles. Calculate the percentage of waste.
  • Minute-hand
    hands How long distance will travel a large (minute) hand on the clock for 48 minutes, if its length is 56 cm?
  • Chord distance
    tetiva The circle k (S, 6 cm), calculate the chord distance from the center circle S when the length of the chord is t = 10 cm.
  • Square and circle
    circle_square Into square is inscribed circle with diameter 10 cm.What is difference between circumference square and circle?
  • Perimeter to area
    circles_1 Calculate the area of a circle with the perimeter 15 meters.
  • Clock hands
    clocks2_16 The second hand has a length of 1.5 cm. How long does the endpoint of this hand travel in one day?
  • Clock
    clock How long is trajectory of second hand of hours for day, if is 15 mm long?

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