Question

bài 5 câu c:v

Answer 1

5:

c: AC=căn 10^2-6^2=8cm

CH=8^2/10=6,4cm

AH=6*8/10=4,8cm

S AHC=1/2*4,8*6,4=15,36cm²

AI/IH=CA/CH=5/4

=>AI/AH=5/9

=>S AIC=5/9*15,36=128/15cm²

S ACB=1/2*6*8=48cm

KA/KB=CA/CB=8/10=4/5

=>KB/BA=5/9

=>S CKB=48*5/9=240/9=80/3

=>S AIC<S CKB