1. AE=EC =>AE=AC:2
=>AE=8:2
=>AE=4cm
=>D)4cm
2. ∆EDC-dreptunghic
=>DE=EC:2
=>DE=4:2
=>DE=2cm
3. DC²=EC²-ED²
=>DC²=4²-2²
=>DC²=16-4
=>DC²=12cm
=>DC=3,5cm
B)3,5cm
4. AE=4cm=>EF=2•4=>EF=8cm
=>AF²=EF²-AE²
=>AF²=8²-4²=64-16
AF²=48cm
=>AF=6,(6)
C)6,(6)
5.EF=8cm
