Question 314761
get the lengths of the 3 pieces in terms of x
let second piece be x
the first will be 3x
the third will be 2x-12
..
add all
x+3x+2x-12=180
6x-12=180
6x=192
x=32 cm second piece
first piece = 3x = 96 first piece
third piece 2x-12= 64-12 = 52.
CHECK
32+96+52= 180