Activity 1.
True or False
1. Two points are in exactly one line.
2. Two points are in exactly one plane.
3. Three noncollinear points are in exactly one plane.
4. Four points are in exactly one plane.
5. Two planes can intersect in exactly one line,
6. Two planes can intersect in exactly one point.
7. Two planes must intersect in exactly one line.
8. Two lines must intersect in exactly one point.
9. Two lines can intersect in exactly one point.
10. Theorems are statements to be proved.​