Question

Tolong bantu dengan penjelasan/caranya ya...

Answer 1

1)AO=10 =OB

2)EB = 16

OB +OE=16

10 + OE = 16

OE = 6

3)OA=10

AE+OE=10

AE+6=10

AE=4

4)BA = AO+OB = 20

5) segitiga ABC sebangun dg segitiga ACE, maka

AE/CA = CA/BA

4/CA=CA/20

80 = CA^2

4√5 = CA

6)EC^2 = CA^2-EA^2

EC^2 = (4√5)^2 - 4^2

EC^2 = 80-16=64

EC= 8

6)CO^2 = OE^2+EC^2

CO^2= 6^2 + 8^2

CO^2 = 36+64 = 100

CO = 10

7) EC x OE = CO x EF

8 x 6 = 10 x EF

48 = 10 x EF

EF = 4,8 (B)