# Circle - 7th grade (12y) - math problems

#### Number of examples found: 158

- Diameter to area

Find the area of a circle whose diameter is 26cm. - Circle - easy 2

The circle has a radius 6 cm. Calculate: - Chord

Point on the circle is the end point of diameter and end point of chord length of radius. What angle between chord and diameter? - Pipe cross section

The pipe has an outside diameter 1100 mm and the pipe wall is 100 mm thick. Calculate the cross section of this pipe. - Circle - simple

Calculate the area of a circle in dm^{2}, if its circumference is 31.4 cm. - Wheel

What is the wheel diameter if on the 0.38 km track turns 128 times? - Arc

The length of the circle is 41 amd arc length of the circle 9. What is the magnitude of the angle of this arc? - Squaring the Circle

Calculating side of the square with the same area as the circle of radius 18. - Wheel

Diameter of motocycle wheel is 52 cm. How many times rotates wheel on roand long 2 km? - Circle simple

Circumference of a circle is 6.28. What is the area of the circle? - Bicycle wheel

Bicycle wheel diameter is 62 cm. How many times turns the bicycle on the road 1 km long? - Circle from string

Martin has a long 628 mm string . He makes circle from it. Calculate the radius of the circle. - Annulus

Calculate the area of two circles annulus k_{1}(S, 3 cm) and k_{2}(S, 5 cm). - Percentage of waste

In a square plate with side 75 cm we cut 4 same circles. Calculate the percentage of waste. - Minute-hand

How long distance will travel a large (minute) hand on the clock for 48 minutes, if its length is 56 cm? - Chord distance

The circle k (S, 6 cm), calculate the chord distance from the center circle S when the length of the chord is t = 10 cm. - Square and circle

Into square is inscribed circle with diameter 10 cm.What is difference between circumference square and circle? - Perimeter to area

Calculate the area of a circle with the perimeter 15 meters. - Clock hands

The second hand has a length of 1.5 cm. How long does the endpoint of this hand travel in one day? - Clock

How long is trajectory of second hand of hours for day, if is 15 mm long?

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