Bantuin nmr 8,9,10,11,12

8. C
9. A
10. C
11. B
12. D

kalo masih gak paham boleh tanya-tanya kok :) maaf kalau fotonya kurang jelas

8.diket:
d:16 cm
t:15 cm
ditanya:
gpk...?
jawab:
s= √(r²+t²)
=√8²+15²
=√64+225
=√289
=17 cm (C)
9.
10.vt=Π.r².t
=3,14.5.5.8
=628 cm³ (C)
11.s²=r²+t²
=7²+24²
=625
=√625
=25
Lpk=La+Ls
=Π.r²+Π.r.s
=22/7.7.7+22/7.7.25
=154+550
=704 cm²
12.Vk=⅓.La.t
=⅓.Π.r².t
=⅓.3,14.5.5.12
=314 cm³
ma'af yang nomor 9 aku nggak tau