divide the measure of the arc by 360
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The fraction of a circle that an arc covers is the angle of the arc divided by 2*pi radians, or divided by 360 degrees if you prefer Imperial Units.
Use the information you have to find it. -- divide the length of the arc by the total circumference of the circle, or -- divide the central angle of the arc by 360 degrees (a full circle)
In a circle, the circumference and diameter vary directly. Which of the following equations would allow you to find the diameter of a circle with a circumference of 154 if you know that in a second circle the diameter is 14 when the circumference is 44?
The radius of a circle is half the length of its diameter. Therefore, to find the radius of a circle with a diameter of 28 cm, you would divide the diameter by 2. So, the radius of the circle would be 28 cm divided by 2, which equals 14 cm.
To find the area of the circle pi*radius*squared and subtract the area of the figure inside