# 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 dm^{2}, 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 cm^{2}. 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. - Radius of the circle

Calculate the radius of the circle whose length is 107 cm larger than its diameter - Circle arc

Circle segment has a circumference of 135.26 dm and 2096.58 dm^{2}area. Calculate the radius of the circle and size of the central angle. - Perimeter of the circle

Calculate the perimeter of the circle in dm, whose radius equals the side of the square containing 0.49 dm^{2}?

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