tolongg dongg 37 sm 38

No. 37
Materi: Kesebangunan dan Kongruen
AC/AD = AB/AE
10+EC/8 = 20/10
10+EC/8 = 2
10 + EC = 2 x 8
10 + EC = 16
EC = 16-10
EC = 6 cm (D).

No. 38
Materi: Bangun Ruang Sisi Lengkung
t kerucut = √(s^2 - r^2)
t kerucut = √(25^2 - 7^2)
t kerucut = √(625 - 49)
t kerucut = √576
t kerucut = 24 cm

V kerucut = 1/3 x π x r x r x t
= 1/3 x 22/7 x 7 x 7 x 24
= 22 x 7 x 8
= 1232 cm^3

V tabung = π x r x r x t
= 22/7 x 7 x 7 x 20
= 22 x 7 x 20
= 3080 cm^3

V gabungan = V kerucut + V tabung
= 1232 + 3080
= 4312 cm^3 (D).

*semoga membantu. sukses selalu ^_^