Practice problems of the circle - page 3 of 48
A circle is a geometric shape that consists of all points that are a fixed distance, called the radius, away from a central point called the center. The distance around the circle is called the circumference and the region enclosed by the circle is called the area of the circle. The formula for the circumference of a circle is C = 2πr, where C is the circumference, r is the radius, and π is a mathematical constant, the Ludolph number, approximately equal to 3.1415926.The formula for the area of a circle is A = πr2, where A is the area and r is the radius.
The diameter of a circle is a line segment that passes through the center of the circle and has its endpoints on the circle. It is the longest distance across the circle and is also twice the length of the radius. The formula for the diameter of a circle is d = 2 * r, where d is the diameter and r is the radius. The diameter of a circle is an important measurement in geometry and is used in many mathematical formulas, such as the formula for the circumference of a circle (C = πd)
Number of problems found: 941
- Tree trunk
Calculate the average tree trunk with a circumference of 192 cm. - Circumference 69934
You know the ratio of the circumference of the circle to the area is 4:9. What is the circle's diameter? - Circumference 8395
The circle's circumference is 321 dm larger than the diameter of the circle. What is the average? - Circumference 6929
Two-thirds of the circumference of the circle is 12π cm long. Calculate the area of the circle.
- The ratio
The ratio of the lengths of the two circles is 5:2. Find the ratio of a a) the radii of these circles b) the areas for these circles - The equator
Calculate the length of the equator. Calculate a radius of 6378 km. Round to the nearest thousand. - Procedure and calculation - Circle r,D
Calculate the diameter and radius of the circle if it has a length 26.59 cm. - Circle - simple
The circumference of a circle is 683 mm. How long in mm is its diameter? - Radius
Determine the circle's radius if its perimeter and area are the same numbers.
- Circumference - a simple
What is the ratio of the circumference of any circle and its diameter? Write the result as a real number rounded to 2 decimal places. - Sprinkler 45721
The rotary sprinkler has a spray of 18m. How much land can it irrigate from one place? - Describe 5845
The tower clock has a small hand 1 m long. What path will the tip of the little hand describe in 1 day? - The formula
The formula for the area of a circle is (Pi x r x r), where r = measure of the radius and Pi = 3.14. What is the area of a circle whose radius measures 1 cm? - Clock hands
The second hand has a length of 1.5 cm. How long does the endpoint of this hand travel in one day?
- Members 82412
There are 12 girls in the circle. Girls make up 2/3 of all members. How many boys are there in the circle? - Circumference 48533
The diameter of the circle is 6.8 cm. Calculate the area of the circle to 1 decimal place. Calculate the circumference of the circle to 1 decimal place. - Simultaneously 37091
Ten children came to the art circle. Eight children painted and nine, I guess. How many children did I paint with, and I think simultaneously? - Perimeter 3573
The carousel wheel has a diameter of 138 meters and has 20 cabins around the perimeter. What circuit does the bike have? - Students activities
There are 28 students in the class. Twenty-one of them is involved in-ring activities. What part of the class does not attend the circle?
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