Question

Kalaau ada yang tau jawabkan dong semuanya 10 soal saja pake caranya juga ya !

Answer 1

1) 72⁰ 36'
=(72 36/60)⁰
= (72 3/5)⁰
= 72,6⁰
Jawaban: (B)

2) 47,43⁰
= 47⁰ (43/100 x 60)'
= 47⁰ (125/9)'
= 47⁰ 25' (4/5 x 60)
= 47⁰ 25' 48"
Jawaban: (E)

4) K = πd
= 22/7 x 28 = 88 cm
n = Jarak/K
= 6,16 m/ 88 cm
= 616 cm/ 88 cm = 7 kali
Jawaban: (C)

5) Keliling = 3 x 1/2 keliling lingkaran + AB
= 3/2 K lingkaran + diameter lingkaran
= 3/2 x 22/7 x 14 + 14
= 66 + 14 = 80 cm
 Jawaban: (D)

Bagian II:
1) 3/5 π = 3/5 x 180⁰ = 108⁰

2) 1,5x + 3x + 2,5x + 2x = 180⁰
10x = 180⁰
x = 18⁰
maka:
sudut AOB = 1,5(18⁰) = 27
sudut COD = 2,5(18⁰) = 45⁰
sudut BOD = 5,5(18⁰) = 99⁰
sudut AOD = 7(18) = 126⁰

3) K 1/2 lingkaran = 1/2 x 2 x 22/7 x r
22 = 22/7 x r
r = 7 cm
Luas lingkaran = 22/7 x 7 x 7 = 154 cm²

4) K = 2(p + l)
38= 2 ( 2x + 3 + x - 2)
19 = 3x + 1
18 = 3x
x = 6
p = 2x + 3        
= 2(6) +3           
= 15                  
l = x - 2
= 6 - 2
= 4
L = pl
=(15)(4) = 60 satuan luas

5) K = 4s
22 = 4s
s = 22/4 = 11/2
maka:
L = s²
=(11/2)²
= 121/4 cm