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

#### Number of problems found: 174

• Circle simple Circumference of a circle is 6.28. What is the area of the circle?
• Circle What is the radius of the circle whose perimeter is 10 mm?
• Circle from string Martin has a long 628 mm string . He makes circle from it. Calculate the radius of the circle.
• Circle area Calculate the circle area with a radius of 1.2 m.
• Circle - easy 2 The circle has a radius 6 cm. Calculate:
• Square and circle Into square is inscribed circle with diameter 10 cm.What is difference between circumference square and circle?
• Circumscription Calculate radius of the Circumscribed circle in the rectangle with sides 20 and 19. It can be rectangle inscribed by circle?
• Circle r,D Calculate the diameter and radius of the circle if it has length 26.59 cm.
• Circle - simple Calculate the area of a circle in dm2, if its circumference is 31.4 cm.
• Two annuluses The area of the annular circle formed by two circles with a common center is 100 cm2. The radius of the outer circle is equal to twice the radius of the inner circle. Determine the outside circle radius in centimeters.
• Squaring the Circle Calculating side of the square with the same area as the circle of radius 18.
• Circle - simple The circumference of a circle is 198 mm. How long in mm is its diameter?
• Rectangle and circle The rectangle ABCD has side lengths a = 40 mm and b = 30 mm and is circumscribed by a circle k. Calculate approximately how many cm is circle long.
• OK circle Calculate the radius (circumradius) of the circle described right triangle with hypotenuse long 33 and one cathetus long 17.
• Circle chord Calculate the length of the chord of the circle with radius r = 10 cm, length of which is equal to the distance from the center of the circle.
• Circle How big is area of circle if its circumference is 80.6 cm?
• Perimeter of circle Calculate the circumference of described circle to the triangle with sides 9,12,15 cm. Calculate the radius of the circle whose length is 107 cm larger than its diameter Circle segment has a circumference of 135.26 dm and 2096.58 dm2 area. Calculate the radius of the circle and size of the central angle. Calculate the perimeter of the circle in dm, whose radius equals the side of the square containing 0.49 dm2?