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Odpowiedź:
14.
a = 3cm
b = 4cm
c = 1cm
x = 6cm
y = 5cm
18.
BAD = 95
BCD = 180 - 40 = 140
ABC = 40
ADC = 360 - 95 - 140 - 40 = 85
20. C.
A = 4*4cm = 16cm
B = 2*(4 cm + 5cm) = 18cm
C = 3*2cm + 5cm = 11cm
D = 2 cm + 3cm + 4cm +5cm = 14cm