Tolong jawab dikertas semuanya a, b,c , d

A.) EF/AB = CF/CB
EF/8 = 6/(6+4)
EF/8 = 6/10
EF = (6/10) x 8
EF = (3/5) x 8
EF = 24/5 = 4 4/5 = 4,8 cm

b.) EF/AB = CF/CB
6/AB = 4/(CF+FB)
6/AB = 4/7
4AB = 6 x 7
4AB = 42
AB = 42/4 = 10,5 cm

c.) EF/AB = CE/AC
2/6 = (AC-AE)/9
1/3 = (9-AE)/9
9 x (1/3) = 9-AE
3 = 9 – AE
AE = 9-3 = 6 cm

d.) EF/AB = CF/CB
5/7 = CF/(CF+FB)
5/7 = CF/(CF+4)
5 x (CF+4) = 7 x CF (kali silang)
5CF + 20 = 7CF
20 = 7CF-5CF
20 = 2CF
CF = 20/2 = 10cm

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