l1=100 s1=10 s2=10 carilah tinggi trapesium??

diketahui :
L = 100
S1, S2 = 10

t = L x 2 : jumlah sisi sejajar
= 100 x 2 : (10+10)
= 200 : 20
= 10cm

L = 1/2 ( s1+s2)*t
 t = L : 1/2 (s1+s2 )
   =100 : 1/2 (10+10)
    =100 : 1/2*20
    = 100 : 10
    = 10
jadi t = 10

semoga bantu