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289 = x² + 64
x² = 225
x = 15cm
b) 0,3dm=3cm
5cm
5² = 3² + x²
25 = 9 + x²
x²=16
x=4cm
c)
14cm
0,5m = 50cm
50² = 14² + x²
2500 = 196 + x²
x² = 2304
x=48cm
a²+b² = c²
a²+8² = 17²
a² = 289-64
a² = 225
a = pierwiastek z 225
a = 15 cm
b)0,3dm i 5cm
0,3 dm = 3 cm
a²+3² = 5²
a² = 25-9
a² = 16
a = pierwiastek z 16
a = 4 cm
c)14cm i 0,5m
0,5 m = 50 cm
a²+14² = 50²
a² = 2500-196
a² = 2304
a = pierwiastek z 2304
a = 48 cm