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b = 7 cm
c = 25 cm
24²+7² = x²
x² = 576+49
x² = 625/ √
x = 25
a₁ = 48 cm
b₁ = 14 cm
c₁ = 50 cm
L = 48+14+ 50 = 112 cm
Odp.: Obwód trójkąta KLM wynosi 112 cm.
Mam nadzieję, że pomogłam. ;)