Iʻm trying to start a math study group for 7th graders.
I know this sounds awkward:ʻD

Um go on Twitter or something, not here.

47 - 90 = 43

43 - 180 = x

x = 137

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft