When planning a a gathering to watch the Pirates, you want to know whom to invite. Among the people you would like to invite are three touchy friends. You know that if Ali attends then Cliff cannot be there. Cliff will attend only if Kirk will be there. Kirk will not attend unless Ali also does. What is the maximum number of people you can invite and who

Step-by-step explanation:

1) Makes a triangle. 6+8>10 In fact this one makes a right triangle. Try it using a = 6 b = 8 c = 10

2) 6 + 12 should exceed the third side. If these two just equal the third side (as these two do) then no triangle is formed.

3) Same with this one 7 + 1 = 8. No triangle is formed. Just a straight line

4) This one is fine. It makes an isosceles triangle with 2 sides = to 7. Any 2 are bigger than the third.