I’m unable to upload a picture for some reason, but the cutoff angle for the 777 is actually 21 degrees and the obscured segment is 15.4m. It can be found in this publication:
https
://www.boeing.com/content/dam/boeing/boeingdotcom/commercial/airports/acaps/777_2lr_3er_f.pdf
Having said that, I concur with what other posters said above. It’s the manufacturer’s and operator’s job to ensure the plane is capable of performing LVTO and/or aprroaches to applicable mima.
and no, you don’t need you count centerline lights to assure 90m visual segment for LVTO. It’s a common misconception. The requirement is just that the airplane geometry allows for 90m visual segment (think an LVTO in Concorde or a DC-3
). It’s not the pilot’s job to evaluate it.
as for landing geometry, it’s all in the FCTM