Question

What is the approximate circumference of the circle that has a center (3, 1) and passes through the point (3, 4)?

Answer 1

Explanation:

You use the Distance Formula

d= √( x2 - x1 )^2 + ( y2 - y1 )^2

substitute

r= √(3-3)^2 + (4-1)^2

√0^2 + 3^2

r = √9

r = 3

Now you can use the equation for finding the circumference

2πr

2π3

≈ 6π or 18.85