tolong ya jawab pertanyaan ini, tolong bangget makasih *pakek jalan

1. C

2. B
3*6=18
18*3=54

3. A
(10*1)+(15*1)/(1+1)
10+15/2
25/2
12,5

4. A
RS = 25-9=16
a)PS^2=9*16=144
PS = 12
b) PR^2=16*25=400
PR=20
PR+PS= 12+20= 32

5. C
2/2+1=2/2+1=8/BC
2/3=2/3=8/BC
4/9=8/BC
4BC= 72
BC= 18

6. D
5/8=7,5/x
5x=60
X=12