Question

No 1 a. dan b. caranya gimana?

Answer 1

1a.
x :  10 = 4,2 : 6
x = 10(4,2) /6
x = 42/6 = 7

10 : 5 = (6+10) : y
y = 5(6+10)/ 10
y = 5(16) / 10
y= 8

1b.
PQ= 10
ST = 6
PT = 24
PT = PR + RT
PR = x, RT = y
x + y = 24
x = 24 - y

PR/PQ  = RT/ST
x : 10 = y : 6
(24-y) : 10 = y : 6
10 y = 6(24 - y)
10 y = 144 - 6y
16 y = 144
y = 9
panjang RT = y = 9