no. 4 aja kk..........

L.ABC = 1/2 . 8. 6
L.ABC = 24 cm"

_______________

AC" = 8" + 6"
AC" = 64 + 36
AC" = 100
AC = V100
AC = 10 cm

AF" = FC" - AC"
AF" = (5V5)" - 10"
AF" = 125 -100
AF = V25
AF = 5 cm

L.AEC = 1/2 . AC. AF
L.AEC = 1/2 . 10 . 5
L.AEC = 25 cm"

Ket :
" = pangkat dua

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