Tolong bantu dari nomor 7 sampai 10 Pelajaran kelas 6 SDterima kasih

No 7
L persegi = s ×s
= 4 x 4
= 16 cm²
L persegi panjang = p × l
= 15 × (4+4+4)
= 15 × 12
= 180 cm²
L segitiga = ½ × a × t
= ½ × 12 × 8
= 48 cm²
L segi banyak = L gabungan
= 16 + 180 + 48
= 244 cm² (C)

No 8
L segitiga = ½ × a × t
= ½ × 14 × 24
= 168 cm²
L ½ lingkaran = ½ × Π × r²
= ½ × 22/7 × 7 × 7
= 77 cm²
L segi banyak = L gabungan
= 168 + 77
= 245 cm² (B)

No 9
L1 (daerah kanan) = p × l
= 25 × 10
= 250 cm²
L2 (daerah kiri) = p × l
= 16 × 7
= 112 cm²
L3 (daerah tengah) = p × l
= (35-10-7) × 6
= 18 × 6
= 108 cm²
L segi banyak = L gabungan
= 250 + 112 + 108
= 470 cm² (D)

No 10
L persegi = s × s
= 28 × 28
= 784 cm²
L lingkaran = Πr²
= 22/7 × 14 × 14
= 616 cm²
L yang diarsir = L persegi – L lingkaran
= 784 – 616
= 168 cm² (A)