Answer:
r = √14
Step-by-step explanation:
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Equation of circle
Center the origin
r = √14
Answer:

Explanation:
Since
is a diameter, arc 
Given that
is a subtended central angle by two diameters,
.
Using the rule of arcs,
→



Answer:
Does the answer help you?
The answer is 0
Let me tell you why
first plug in the numbers
.5(18+14)-(18-14)^2
(9+7)-(4)^2
16-16
0