4. Perhatikan gambar, Jika panjang AB=BC=3 cm, panjang AE adalah ... a. 3√3 cm b. 6 cm c. 6√2 cm d. 9 cm

d.9 cm tapi aku gatau caranya

AC^2 =AB^2 + BC^2
= 3^2 + 3^2
= 9 + 9
= 18
AC = √18 =3√2

AD^2 = AC^2 + CD^2
= 18 + 3^2
=18 + 9
= 27
AD = √27 =3√3

AE^2 = AD^`2 + DE^2
= 27 + 3^2
= 27 + 9
= 36
AE = √36
AE = 6 cm

B. 6 cm