6.3*10^17 is correct hope this helps
That's like asking "What's the dollar amount of one half ?"
"Half" is not an amount. It's half of some amount that's been
previously described.
8.15% isn't an amount of anything.
It's 0.0815 of some amount that's already been described.
The <em>correct answer</em> is:
Use the circumcenter to determine the center of the circle
.
Explanation:
The steps James has completed have constructed the perpendicular bisectors of two sides of the triangle, DE and EF. The point where the perpendicular bisectors of the sides of a triangle meet is the circumcenter of the triangle. This is also the center of the circumcircle, or circumscribed circle.
We need to extend these bisectors so that they intersect. We then set our compass on this point and set the width from this center to any vertex of the triangle. This will be the radius of the triangle; we draw the circle and are finished.