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ABEF = P x T = 80
( 150/L ) x T = 80
T = 80 : 150/L
T = 80/150 L
T = 8/15 L
BCGF = L x T = 120
L x 8/15 L = 120
8 L² = 120 x 15
8 L² = 1800
L² = 225
L = √225
L = 15
P x L = 150
P x 15 = 150
P = 10
P x T = 80
10 x T = 80
T = 8
P = 10 cm
L = 15 cm
T = 8 cm