Question

Pleass bantu ya pleasss demi nilai

Answer 1

2) Ls = 30 × (2 × 7)
= 30 × 14 = 420cm²
L kcil = (30 - 7) × 7
= 23 × 7 = 161cm²
L byg2 = 420 - 161 = 259cm²
3) L trapesium = {(4 + 6+8) x 4}/2
=( 18×4)/2 = 72/2 = 36cm²
L persgi = 8 × 8 = 64 cm²
L ttl = 36 + 64 = 100cm²
5) Ls = 10 × 10 = 100cm²
L putih = 2 × L sgtiga
= 2 × {(5×5)/2}
= 2 × 25 / 2 = 25cm²
Lbyg2 = 100 - 25 = 75 cm²
8) L prsgi = 21 × 21 = 441dm²
L lngkran = 22/7 x 10,5 x 10,5
= 346,5 dm²
L byg2 = 441 - 346,5 = 94,5 dm