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BC = 4,2 cm
CD = 3 cm
PS = 1 cm
SR = 2,5 cm
RC = 2 cm
a) AE/PS = CD/RC
AE/1 = 3/2
2AE = 3 × 1
AE = 3/2
AE = 1,5 cm
b) QC/BC = RC/CD
QC/4,2 = 2/3
3 QC = 2 × 4,2
QC = 8,4/3
QC = 2,8 cm
c) DE/SR = CD/RC
DE/2,5 = 3/2
2 DE = 3 × 2,5
DE = 7,5 / 2
DE = 3,75 cm
d) PQ/AB = RC/CD
PQ/7,5 = 2/3
3 PQ = 2 × 7,5
PQ = 15/3
PQ = 5 cm