tolong kak no7-10 pakai cara terima kasih

8) Luas Rumah = (6m) x (3m)
= (600cm) x (300cm)
= 180.000 cm²

Luas Lantai = (30cm) x (30cm)
= 900 cm²

Banyak Lantai
= 180.000 ÷ 900
= 200 Lantai

9)
a. K = s + s + s
(63cm) = 3 x ( y + 6 )
63 = 3y + 18
63 - 18 = 3y
45 = 3y
15 = y

b. Panjang sisi segitiga
= ( y + 6 )
= ( 15 + 6 )
= 21 cm

10)
<A = <B = 180° - 110°
<A = <B = 70°

<C = 180° - ( 70° + 70° )
= 180° - 140°
= 40°