carilah luas gabungan

d1 = 14 cm
d2 = 28 cm
t trapesium = 7 cm
sisi sejajar = 50 +21 +50 = 121
t segitiga = 7 cm
alas segitigas 21 cm
L layang layang + L Trapesium - LSegitiga perpotongan trapesium =
=1/2.d1.d2 + 1/2.sisi sejajar.t - 1/2.a.t
=1/2.14.28 + 1/2.121.7 - 1/2.21.7
= 196 + 423,5 - 73,5
= 546 cm^2
jadi luasnya 546 cm^2