Question 694165
1. A ray has two endpoints

Never
2. An angle is equal to its supplement

sometimes
3. A right triangle is isosceles
sometimes
4. The complement of an acute angle is an obtuse angle
Never

6. Two skew lines are coplanar
Never
7. If two angles have a common side, the angles are adjacent

Always
8. The supplement of an obtuse angle is an obtuse angle
Never