Word collinear means 3 points lie on the same straight line
1) from the given figure
There are three points not collinear as points J, H, and K
They are not lying on the same straight line
2) Two opposite rays means two rays have the same starting points but go in the opposite directions, then they can form a straight line
From the given figure HG and HI are two opposite rays because they have the same starting point H and go in opposite directions
3) You can name the segment JH as HJ because the segment has two endpoints, so we can start with any one of them
The other name of JH is HJ
4) The plane names by 3 point lie on it
Since the plane contains HL ray
Then the name of the two planes are
GHL and KHL
5) The names of the two planes that intersected at a common side are
GHK and LHK, they are intersected at the side HK