Circle - practice for 12 year olds - page 6 of 16
Number of problems found: 311
- Perimeter of the circle
Calculate the perimeter of the circle in dm, whose radius equals the side of the square containing 0.49 dm². - CD disc
A compact disc has a diameter of 11.8 cm. What is its surface area in square centimeters? - Inscribed 44101
A circle is inscribed in the triangle with sides of 13 cm, 14 cm, and 15 cm. What is its radius? - Diameter 2949
What is the diameter of a circle with an area of 35 cm square?
- The star
Find the area of the shaded part of the square with a side of 22 cm. - Circumference 61704
Calculate the area of a circle if its circumference is 21.98 dm. Express the result in square decimetres. - Circles
The area of a circle inscribed in a square is 14. What is the area of a circle circumscribed around a square? - Squaring the Circle
Find the side of the square with the same area as the circle of radius 18. - Perimeter of circle
Calculate the circumference of a described circle to the triangle with sides 9,12,15 cm.
- The circle
If the radius of a circle is 3+root3, what is the area? - On a
On a someday, the Sun, Venus, and the Earth are in eclipse, i. E. Venus is between the Sun and the Earth. Venus orbits the Sun in 225 days. In how many years will all three bodies be in alignment again? - Hands
The clock shows 12 hours. After how many minutes will the angle be between the hour and minute hand 90°? Consider the continuous movement of both hands for hours. - Clocks
How long will a path of the end of the clock's minute-hand long 7 cm for 330 minutes? How long will we walk at the same time hour-hand? - Describes 82518
The minute hand describes an angle of 180 degrees in half an hour. In how many minutes does the minute hand cover an angle of 192 degrees?
- Seagull
An artificially created island in the shape of a circle with a radius of 50 m is overgrown with grass. The only exception is a landing area for helicopters in the shape of a rectangle measuring 15 m and 8 m. What is the probability that the flying seagull - Merry-go-round 82611
Calculate the magnitude of the angular velocity of the seat of a merry-go-round moving in uniform motion in a circle with an orbital period of 0.2 minutes. - Minute-hand
How long will a large (minute) hand travel on the clock for 48 minutes if its length is 56 cm? - Coincide 69334
In how many minutes after the second hour do the clock hands coincide? - Minutes 6071
What is the angle of the big hand of the watch in 20 minutes?
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