[ellis1101]

Hi, so I've got 3 bicyclic alkenes, and I'm supposed to put them in increasing stability. I can't quite describe them, one is a bicyclic alkene with the double bond in between the two rings, one has a double bond on only one ring with two hydrogens coming out of the shared bond, and one is two rings with one double bond on just one of the rings. I have no clue how to approach this problem, can anybody help me out? (not that I expect you to solve this problem, just some background info would be very very helpful!) Thank you!

[Yggdrasil]

What geometry (i.e. bond angles) do carbons participating in a double bond prefer?  Which of these structures causes the largest deviation from ideal bond angles?