Jawabanmu

2014-04-14T09:54:28+07:00
Kell trap = AB+BC+CD+DA
28          =AB+BC+CD+DA
AB = 7
BC = 7
CD = 7
DA = 7

L.trap = jml sisi sjjr x t : 1/2
         =18 x 7 : 1/2
         =63
2014-04-14T10:03:35+07:00
Keliling trapesium = A + B + C + D
                  28 dm = 6 dm + 12 dm + C + D
     28 dm - 18 dm = C + D 
                  10 dm = C + D

karena C = D   jadi C = D = 10dm/2 = 5 dm

tinngi = 4dm
luas trapesium = ( A + B ) x t x  \frac{1}{2}
                        = ( 6 + 12 ) x 4 x  \frac{1}{2}
                        = 36 dm²
jadikan yg terbaik ya ;D
kk bagaimana kalau gambar kk
maksudnya gambar apa?
apa pertanyaan trapesium pada'