Find radius, circumference, area and arc length in circle

In summary, the formula for finding the radius of a circle is r = c / 2π, where r represents the radius, c represents the circumference, and π is a constant value of approximately 3.14. The circumference of a circle can be calculated using the formula c = 2πr, and the formula for finding the area of a circle is A = πr^2. To find the arc length of a circle, the formula is L = (θ/360) x 2πr, where L represents the arc length, θ represents the angle of the arc (in degrees), and r represents the radius. The relationship between the radius and circumference of a circle is that the circumference is equal to the
  • #1
Etrujillo
9
0
So I've been able to solve
A.12 inch
B.24 inch
C.75.3982
D.452.389
Cant solve e. Arc length can anyone please explain the formula. Thank you
 

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  • #2
Etrujillo said:
So I've been able to solve
A.12 inch
B.24 inch
C.75.3982
D.452.389
Cant solve e. Arc length can anyone please explain the formula. Thank you
So far so good.

You know that the circumference is 75.3982 in, then how much is 105/360 of it?

-Dan
 
  • #3
Note that the instructions say to express your answers in terms of \(\pi\). :)
 

FAQ: Find radius, circumference, area and arc length in circle

What is the formula for finding the radius of a circle?

The formula for finding the radius of a circle is r = c / 2π, where r represents the radius, c represents the circumference, and π is a constant value of approximately 3.14.

How do you calculate the circumference of a circle?

The circumference of a circle can be calculated using the formula c = 2πr, where c represents the circumference and r represents the radius.

What is the formula for finding the area of a circle?

The formula for finding the area of a circle is A = πr^2, where A represents the area and r represents the radius. This formula is based on the relationship between the radius and the circumference of a circle.

How do you find the arc length of a circle?

The formula for finding the arc length of a circle is L = (θ/360) x 2πr, where L represents the arc length, θ represents the angle of the arc (in degrees), and r represents the radius of the circle. This formula is based on the proportion of the angle to the total angle of a circle.

What is the relationship between the radius and circumference of a circle?

The relationship between the radius and circumference of a circle is that the circumference is equal to the diameter multiplied by π (πd), or twice the radius multiplied by π (2πr). This relationship allows us to use the radius to find the circumference and vice versa.

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