In a circle with radius r, the central angle of an arc with arc length of 3 π R / 4 =? Radians
This is to use the arc length formula L = α * r
In a circle with radius r, the central angle of an arc with arc length of 3 π R / 4 = (3 π R / 4) / r = 3 π / 4 radians
RELATED INFORMATIONS
- 1. On a circle with a radius of 25 mm, if the length of an arc is 50 mm, then the arc number to the center angle of the circle is (),
- 2. What is the radius of an arc with a chord length of 1690 and a chord height of 405?
- 3. How to draw an arc with radius 2700 and arc length 4241 by CAD
- 4. If the chord length and arch height are known, the radius can be calculated
- 5. How to calculate the radius when the chord length and arch height are known? I'm not good at mathematics, because I need to find a method in practice, because I need to calculate frequently, I don't know if I can use the equation?
- 6. The circumference of a circle is 8 cm. In this circle, the arc length opposite the central angle of 90 ° is () cm
- 7. The length of an arc is 12cm, and the center angle of the circle it faces is 270 degrees. How many centimeters is the circumference of the circle where the arc is located?
- 8. 1) Given that the length of an arc is (1 / 3) π and the center angle of the opposite circle is 30 °, the radius of this arc is? 2) the arc length of a circle with radius 5 is exactly the same 1) Given that the length of an arc is (1 / 3) π and the center angle of the opposite circle is 30 °, then the radius of the arc is? 2) If the arc length of a circle with radius 5 is exactly equal to the circumference of a circle with radius 2, then in a circle with radius 5, the angle of the center of the circle opposite to the arc is () degrees
- 9. It is known that the length of the wiper is 40 cm, and the central angle of the wiper swing is 135 degrees, then the arc length of the area that the wiper passes through is 40 cm______ Cm (π = 3.14)
- 10. For a circle with a radius of 6cm, the arc length of a central angle is 6.28cm. How many degrees is the central angle?
- 11. If the radius of the circle becomes three times of the original, and the length of the opposite arc remains the same, the central angle of the arc is the same as that of the original arc______ Times
- 12. If the central angle of a circle opposite to an arc of six sects is 60 degrees, the radius of the circle opposite to the arc is 60 degrees
- 13. If the radius of the circle is 6, then the arc length of the center angle of 60 ° is______ .
- 14. The chord length is 4.9 meters, and the bow height is 0.7 meters
- 15. The chord length is 8 meters, the chord center to the highest point of the arc is 3 meters, find out the arc length Chord length, H Gao Xianqiu Please explain your ideas for you
- 16. If you know the radius and arc length of a sector, do you want to find the distance between two points of the sector arc length, that is, the chord length (the line connecting the two ends)
- 17. Geometry is too bad to understand the formula, please master to calculate, chord length 6 meters, chord center to arc top 1.7 meters, find an arc length, thank you
- 18. A: Geometry is too bad to understand the formula, chord length 120 meters, chord center to arc top 40 meters, find arc length, urgent B: Given the diameter of the ball 83 meters, find a quarter of the surface area of the ball
- 19. The central angle of the sector is unchanged, the radius is reduced to one third of the original, and the area of the sector is reduced to the original_____ .
- 20. The sector with radius of 10 and center angle of 216 ° forms a cone. What is the volume of the cone?