Answer:
probably is 140 or is it just the whole question?
Can you please explain what question you have?
Answer:
GK = 20
Step-by-step explanation:
Answer:

Step-by-step explanation:
collinear points are points in the same line, like
●-----------------●------------------------------------------●
and the line will always be contained by a plane, so since the line is in a plane, all points in it will also be in the same plane, and therefore be coplanar.