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a² = (1/2 * 16)² + 15²
a² = 8² + 15²
a² = 64 + 225
a² = 289
a = pierwiastek z 289
a = 17 cm
Ob = 17 cm + 17 cm + 15 cm
Ob = 49 cm
Odp: Obwód tego trójkąta wynosi 49 cm.