Trapesium ABFE dan trapesium CDEF adlh sebangun. Hitunglah luas trapesium CDEF.... *soal di gambar

jawab

EF² =AB x CD 
EF = √(64 x 36) 
EF = 8x6
EF = 48

EF (GH + CH)  = (CD x HG + AB x CH)  
48 (36+a) =  36x 36 +  64 (a) )
1.728 + 48a = 1.296 + 64a
432 = 16a
a= 27
CH = 27 
Luas Trap CDEF = 1/2 (CD + EF)(CH)
L = 1/2 (36+ 48)(27
L = 1.134