So, all I have to do is to count up my single bonds. so this is a, this is one, two, three, for a double-bond, I know one of those is a sigma-bond from my video on sp2-hybridization. so four, five, six, seven, eight nine, and then, in this video, we saw that for triple bond, one of those is sigma-bond, right? so one of those is a sigma-bond there, so there is a total of ten, sigma-bonds. so we just count 10 sigma-bonds. 