plisssssd jawabbb buat skrg dipelajariii

25.1/4×3.14×40×40=1/4×125.6×40=1/4×5024=5024/4=d.1256cm²
26.22/7×14×14×3/4=44×14×3/4=616×3/4=1848/4=d.462cm²
27.b1=1/2×22/7×14×14=22×14=308cm²
     b2=28×30=840cm²
     ls =308+840=c.1148cm²

25. D = 40 cm, r = 20 cm
3,14 × 20 × 20 = 1256 cm² (D)
26. LO = 22/7 × 14 × 14 = 616 cm²
3/4×616 = 462 cm² (D)
27. L½O = πr² = (22/7×14×14) / 2 = 616/2 = 308 cm²
L[] = p×l = 30 × 28 = 840 cm²
Jd, luas bangun= 308+840 = 1148 cm² (C)