If the distance between M and N on the plane is 17cm, P is another point on the plane, and PM + PN = 25cm, then : 1. Point P is on line Mn 2. Point P must be on line Mn 3. Point P is outside the line Mn 4. Point P must

If the distance between M and N on the plane is 17cm, P is another point on the plane, and PM + PN = 25cm, then : 1. Point P is on line Mn 2. Point P must be on line Mn 3. Point P is outside the line Mn 4. Point P must

If the distance between M and N on the plane is 17cm, P is another point on the plane, and PM + PN = 25cm, then:
(point P is outside the line Mn)
Because PM + PN > Mn, point P is outside the segment Mn