Question

jawab please besok dikumpulkan mana mau ada ujian please kak tolong jawab ​

Answer 1

1] 1) Luas trapesium = (s1+s2) × t/2 =(8cm+12cm)×6cm/2 = 20cm×3cm = 60cm^2.
2)Luas trapesium = (15cm+10cm)×8cm/2 = 25cm×4cm = 100cm^2.
3) Luas trapesium = (s1+s2)×t/2 =
(18dm+22dm)×15dm/2=40dm × 7,5dm = 300dm^2.
4) Luas trapesium = (s1+s2)×t/2
= (25cm+35cm)×t/2
600cm^2 =(60cm)× t/2
1200cm^2=60cm×t
t = 1200cm^2/60cm.
t = 20 cm.
5) Luas trapesium =(s1+s2)×t/2
770 cm^2 = (46mm+s2)× 22cm/2
770cm^2=(4,6cm+s2)×11cm.
770cm^2=50,6cm + 11s2 cm
770cm^2-50,6cm=11s2 cm
719,4cm^2=11s2 cm
S2 = 65,4 cm

2] Luas trapesium =
360 cm^2= (24cm+s2)×18cm/2
360cm^2 = (24cm+S2)×9cm
360cm^2 = 216 cm + 9S2 cm.
360cm^2-216cm = 9s2 cm.
144cm = 9s2 cm
S2 = 144cm/9cm
S2 = 16cm.
Jadi, sisi yg lain trapesium adalah 16 cm.

3] A * * D
B * * C
AB//CD dan AD = BC, panjang diagonal AC = 5x-3 cm, Panjang diagonal BD = 3x+5 cm.
a) nilai x, dan b) panjang.
Jawaban :
a) diagonal AC = diagonal BD
5x - 3 = 3x + 5
5x - 3x = 5 + 3
2x = 8
x = 4
b) Panjang AC = 5x - 3
= 5 (4) - 3
= 20 - 3
= 17 cm.
4] PQ // RS, PQ=RS => 4:3. => 4+3=7jumlah perbandingan.
Luas trapesium 168dm^2, tinggi trapesium 8dm.
Panjang PQ = 4/7×168
= 24 × 4
= 96dm

5] Luas tanah pak tukul berbentuk trapesium = (s1+s2)×t/2 = (32m+48m)×10/2m
= 80m×5m
= 400m^2
Tanah pak tukul di jual dalam Rp150.000/m^2. Pak tukul harus menerima uang sebanyak = 400m^2×Rp150.000 = Rp60.000.000,-

Ok.