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see below

Step-by-step explanation:

We know that the center is (0,0) and the radius is |3 - 0| = 3.

Standard form of a circle: (x - h)² + (y - k)² = r² where (h, k) is the center and r is the radius. Plugging in h = 0, k = 0 and r = 3 gives us x² + y² = 9.

See below.

Step-by-step explanation:

The equation for a circle is:

Where (h,k) is the center and r is the radius.

From the graph, we can see that (0,0) is the center.

Thus, h=0 and k=0:

From the graph, we can also see that the radius is 3 as (-3,0) and (3,0) are points on the circle.

Thus, r=3, and r^2=9.

The equation is:

answer: 590

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer