What is the only Canadian province whose borders form a rectangle?

I have lived in Saskatchewan for almost 47 years already. Yes, winters can be very cold in Saskatchewan, but they were even colder in Manitoba where I grew up.

And to think, I AM A BORN AND BRED CANADIAN.

Player #48458, beautiful country!! A must see!!

Player ccbkd, I have never been there but I was in Montreal and loved it the people were very nice and I enjoyed them speaking french