" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
1. L = 1/2. a. t90 = 1/2. 4x. 5x
180 = 20x^2
9 = x^2
x = 3
t= 5x = 15cm
2. 180 = 5x + 6x + 7x
180 = 18x
x = 10
CBD = 180 - 6x = 180-60= 120°