Answer:
Step-by-step explanation:
Givens
arc length DF = 30
pi = 3.14
Comment
The problem is that it looks to me like you have marked DF = 30. That's not what is given. What you are given is a part of the circumference is equal to 30.
Solution
The formula you should be using 100/360 * 2 * pi * r You should be solving for r.
30 = 100/360 * 2 * pi * r Multiply both sides by 360
30*360 = 100 * 2 * pi * r Combine left and right
10800 = 200* 3.14 * r
10800 = 628 * r Switch Divide both sides by 628
628 * r/ 628 = 10800 / 628
r = 17.197
Answer
Area of the circle = pi*r^2
Area of the circle = 3.14 * 17.197^2
Area of the circle = 928.66 m^2
