besertakan caranya ya...

t = akar12^2 - (19-10^2)
t =akar 144- 81
t= akar 64
t= 8

2 trapesium =( 19 + 10) 8 /2
= 2* 29*8/2
= 232 cm
alas bawah = 19*21 =399 cm
alas atas = 10*21 = 210 cm
sisi miring = 21*12 = 252cm
sisi tegak = 21*8 = 168 cm
jadi jumlah keseluruhan = 232 + 399 + 210 + 252 + 168 = 1.261 cm