11^2=121
12^2=144
You can write either 11 or 12.
Yes, I can! If you have any more questions, please ask!
From the info
You would use the tan x=5/2
But u would take the inverse of tan or 1/tan
The tan^-1(5/2)
=21.80140
The angle of b would be 21.80
Hope it helps