4
An angle
CAB
3 rays that are not on the same line.
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.
An angle
21 - including one of 360 degrees.
A noncollinear ray is a ray that is not a straight line. So even two of these could criss-cross infinitely many times. It is impossible, therefore, to answer the question.
Ten.Each angle is determined by two rays, so the answer is equivalent to the number of combinations of 2 out of 5 = 5*4/(2*1) = 10
An angle
CAB
A figure that is made up of two noncollinear rays with a common endpoint is an angle. The angle that is formed can be acute, right, obtuse or reflex.
Six angles.
10 rays can meet in 45 vertices. At each such vertex there will be 4 angles which makes 180 angles in all.
3 rays that are not on the same line.
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.
3
it is an angle