Tolong bantu ya!! MauDikumpulinBesok!!!!#N0 57 sama #58

57.3,14×15=47,10×15=706,50cm³= (B) 706.5 cm²

58. Persegi panjang=P×L=8×5=40cm²
Layang-layang =
½×d1×d2=7+4×3+3=11×6=½×66=33cm²
L=40cm²+33cm²=(B) 73cm²

57. L.Lingkaran= pi × r × r
= 3,14 × 15 × 15
= 3,14 × 255
=706,5 cm2

58. L.Persegi panjang= p × l
= 8 × 4
= 32 cm2
L.Layang-layang= d1 × d2 : 2
= 11 × 6 : 2
= 33 cm2
L.kedua bangun= 32 + 33
=65 cm2