Circle - practice for 13 year olds - page 2 of 29
Number of problems found: 563
- Two chords 6
A chord PQ is 10.4 cm long, and its distance from the center of a circle is 3.7 cm. Calculate the length of a second chord RS, which is 4.1 cm from the center of this circle. - Geometric Solid
A concrete pipe is 1.0 m long. The inside and outside diameters are 60 cm and 75 cm, respectively. What is the volume of the concrete (in cubic meters) needed to make 25 pieces of pipe? - A chord 2
A chord of length 16 cm is drawn in a circle of radius 10 cm. Calculate the distance of the chord from the centre of the circle. - A goat 2
As shown, a goat is tied at one corner of a rectangular shed by a 5-meter-long rope. The shed measures 3 m by 2 m and is surrounded by grassland. What is the area of the grassland in which the goat can graze? Give your answer to the nearest m². - Light area
The lamp illuminates a circle with a diameter of 10 m. What area does the light illuminate? - Circle area increase
How does the area of a circle change if we double its radius? How many times does its area increase? - Circle circumference area
Two-thirds of the circumference of the circle is 12π cm long. Calculate the area of the circle. - Clock Hand Tip Path
The tower clock has a small hand 1 m long. What path will the tip of the little hand describe in 1 day? - Minute hand circumference
What part of the circle's circumference will the minute hand pass in 15 minutes? - Wheel diameter
A 1 m diameter wheel rolled along a 100 m long track. How many times did it turn? - Two circles
Two circles with a radius of 4 cm and 3 cm have a center distance of 0.5 cm. How many common points have these circles? - Radius
Determine the radius of a circle whose circumference and area are numerically equal. - Hands coincide In how many minutes after the second hour do the clock hands coincide?
- Clock hand angle
What is the angle of the hour and minute hands on the clock of the old tower if it is exactly eight o'clock? - Circle circumference diameter
The circle's circumference is 321 dm larger than its diameter. What is the diameter? - Area of a circle
The circumference of the circle is 150.72 centimeters. Calculate the area of the circle. - Baking a cake
Christy is baking a cake with a 9-inch diameter. She wants to cover the top with buttercream icing. How much icing will she need? - Clock hands intersection
Calculate exactly when the hour and minute hands on the clock intersect. - Circle r,D
Calculate the diameter and radius of the circle if it has a length 26.59 cm. - 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
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