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2 answers:
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The picture in the attached figure
we know that
area of the circle=pi*r²
if 45° has an area-------> 18*pi units²
360° (full circle)----------> x
x=360*18*pi/45-----> x=144*pi units²
area of circle=pi*r²
144*pi=pi*r²------> r²=144--------> r=√144-----> r=12 units
we know that
area of the circle=pi*r²
if 45° has an area-------> 18*pi units²
360° (full circle)----------> x
x=360*18*pi/45-----> x=144*pi units²
area of circle=pi*r²
144*pi=pi*r²------> r²=144--------> r=√144-----> r=12 units
Answer:
C.
Step-by-step explanation:
The standard equation of a circle, given the radius r units and center (h,k) is given by:
From the question, we have the center of the circle to be (3,1) and the radius is 2 units.
We substitute the center and radius of the circle into the equation to get:
The correct answer is C