2.5-2.8

I was having kind of a hard time understanding the examples when only numbers were being used, but as soon as they used visual examples, like the isosceles and equilateral triangles, I not only  understood better, but when I went back I understood the previous ones better as well.  I thought it was very interesting that when dealing with biconditional statements, both statements can be falst, but when put together the combined statement is true because both parts are false.