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= 45 cm
2. 10+10+8
= 28 cm
3. 16+16+16
= 48 cm
4. kll = PQ + PR + QR
40 = 12 + 12 + PR
40 = 24 + PR
16 = PR
5. kll = 20 + 16 + s
54 = 36 + s
18 = s
1.15+12+18=44
2.10+10+8=28
3.16×3=48
4.40=12+12+×
x=40-24
x=16
5.54=20+16+×
x=54-36
x=18