Question #94a03
1 Answer
Mar 22, 2016
Use two pairs of points:
Perpendiculars to
Explanation:
Let
As we know, a perpendicular to a midpoint of a chord is a diameter of a circle of rotation. Therefore, a perpendicular to a midpoint of
So is a perpendicular to a midpoint of
Thus, having two diameters, we get a center
The angle of rotation is