" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
45°+(2x-5)°+3x°=180°
45-5+2x+3x=180°
40+5x=180°
5x=180-40
5x=140
x=140/5
x=28
∠B=(2x-5)°
=(2(28)-5)°
=(56-5)°
=51°