NO 23 BESOK TERAKHIR

EF = (DE × AB) + (EA × DC)/ (AD)
EF = (2 × 80) + (3 × 54)/ 5
= 160 + 162/5
= 322/5
= 64,4 cm
maaf kalo salah

EF=DC.AE + ED.AB : AE + DE
= 54.3 + 2.80 : 3 + 2
= 162 + 160 : 5
= 322 : 5
= 64,4 cm (C)