How to find the radius of a circle with a circumference of 10 centimeters? To find the radius of a circle with a circumference of 10 centimeters, you have to do the following: Divide the circumference by π, or 3.14 for an estimation. The result is the circle's diameter, 3.18 centimeters.
You would divide 50 by 3.14(pi).
<span>the formula for getting area is diameter times pi so you do the reverse. </span>
<span>you end up getting 15.9235669 which rounds up to 16. </span>
<span>hope this helps
i think this is right
</span>
Answer:
Step-by-step explanation:
The length of an arc with measure and radius is given by . From the figure, we know that the radius of arc ADC is 4, but we don't know the measure of the arc. Since there are 360 degrees in a circle, the measure of arc ADC is equal to the measure of the arc formed by subtracted from 360. The measure of the arc formed by consists of two congruent angles, and . To find them, we can use basic trigonometry for a right triangle, since by definition, tangents intersect a circle at a right angle.
In any right triangle, the cosine of an angle is equal to its adjacent side divided by the hypotenuse, or longest side, of the triangle.
We have:
Therefore,
The measure of the central angle of must then be
Thus, the length of is equal to:
(three significant figures as requested by question).
6+5+x=41
11+x=41
11+-11+x=41+-11
x=30
Sue is 30 years old