mohon jawabanya ya no 3. besok dikumpulin

a.ac^2=ab^2+bc^2
ac^2=12^2+9^2
ac^2=144+81
ac=√225
ac=15cm

ad^2=cd^2-ac^2
ad^2=25^2-15^2
ad^2=625-225
ad=√400
ad=20cm

b.L∆abc=1/2×ab×bc
=1/2×12×9
L∆abc=54cm^2

L∆acd=1/2×ad×ac
=1/2×20×15
L∆acd=150cm^2
jadi perbandingan segitiga abc dan acd
adalah
54:150
9:25

^ saya anggap kuadrat yaa


a) AC^2=CB^2+AB^2
=12^2+9^2
=144+81
=225
AC =akar 225
=15


AD^2=DC^2-AC^2
=25^2-15^2
=625-225
=400
AD =AKAR 400
=20

b) LABC =1/2.a.t
=1/2.9.12
=54 cm^2

LACD =1/2.a.t
=1/2.15.20
=150 cm^2


perbandingan LABC:LACD = 54:150 <=>9:25


maaf kalau salah