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Infinitely many. There an infinite number of points on a line and each point can be an end point of two rays.
14
They have one point in common.
rays
6 points
Just one.
One! That is what collinear means!
2
Infinitely many. There an infinite number of points on a line and each point can be an end point of two rays.
Rays of light, which, proceeding from different points of an object, tend toward a single point.
An angle separates a plane to 3 sets: 1) Points between the 2 rays 2) Points on one of the rays 3) Points outside of the 2 rays
One
14
They have one point in common.
Cathode rays are electrons.
Two and only two rays having the same end points are in an angle.
if the rays have no common points, the answer is zero. if the rays all have the same end point, the answer is 21 -- counting only the acute angles.