They are all of the infinite number of points whose x-coordinate is zero.
Noncollinear points are points which are not all on a common line.
That is a sphere.
That's a sphere whose radius is the constant equal distance.
Intersection Ad Muncher
They are all of the infinite number of points whose x-coordinate is zero.
Noncollinear points are points which are not all on a common line.
sphere
They are all near an artery.
No, they only have the one common endpoint in common.
A circle or a sphere
sphere
Possibly a circle
All points whose y-coordinate is twice its x-coordinate.
Point common to two sides of an angle = vertex. Points common to two sides of a polygon, if they exist, are all the points along an edge.
all spheres
All of the infinitely many points whose ordinate is 2 less than its abscissa.