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:
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 dm2, if its circumference is 31.4 cm.
What is the wheel diameter if on the 0.38 km track turns 128 times?
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.
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.
Calculate the area of two circles annulus k1 (S, 3 cm) and k2 (S, 5 cm).
- Percentage of waste
In a square plate with side 75 cm we cut 4 same circles. Calculate the percentage of waste.
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?
How long is trajectory of second hand of hours for day, if is 15 mm long?