Circle practice problems - page 13 of 50
Number of problems found: 989
- Magnification 21383
When we increased the circle's radius by 2 cm, its area increased by 40π cm². Determine the radius of the circle before magnification. - Circumference 20933
Calculates the circumference of a circle if its area is S = 2119.5 cm². - Circles
How many different circles are determined by 11 points at the plane if 7 of them lie in a straight line? - Calculate 39131
A circle describes a square with a side of 8 cm. Calculate the area of the rest of the circle if we cut out the square. - Circumference 6338
The circle has the same area as the square, whose circumference is 400m. Calculate the diameter of the circle. - Diameter 6289
A circle with the largest possible diameter is cut from a square with a side length of 35 cm. What percent of the square area is waste? - Cutting circles
From the square 1 m sides, we have to cut the circles with a radius of 10 cm. How many discs will we cut, and how many percent will be wasted?
- Semicircle
To a semicircle with a diameter of 10 cm, inscribe a square. What is the length of the square sides? - Circle - simple
Calculate the area of a circle in dm² if its circumference is 31.4 cm. - Lake or pond
The landlord has a square lake. Trees grow around it. The lake wants to enlarge the pond twice without cutting down or flooding any trees. How will he do that? - Flowerbed 22573
Around a round flowerbed with a diameter of 6m should be made a sidewalk with a width of 0.5m. How many square meters of material do we need? - Calculate 6930
Calculate the diameter of a circle whose area S = 78.5 cm². - One-third 2872
The cycling racetrack has the shape of a circle with an area of 2 ha. How long will a cyclist drive one-third of a kilometer in a perimeter? - Circle
How big is the area of a circle if its circumference is 51.2 cm? - Perimeter of the circle
Calculate the perimeter of the circle in dm, whose radius equals the side of the square containing 0.49 dm².
- Logs
The log has a diameter of 30 cm. What largest beam with a rectangular cross-section can be carved from it? - Everywhere 36403
We cut out the largest possible round tablecloth from a square fabric of 150x150 cm. After setting, it hung around 20 cm everywhere. What is the area of the round tabletop? - Radius
Find the radius of the circle with area S = 200 cm². - Tree trunk
What is the smallest diameter of a tree trunk that we can cut a square-section square with a side length of 20 cm? - Cutting square
We cut the circle with the highest possible diameter from a square with a side of 30 cm. How many percent of the square area is this circle?
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