tolong no.32 serta cara arigatou..

Kesebangunan dan Kongruen

CD/EF = AD/AE
CD/12 = 14/8
CD/12 = 7/4
4CD = 7 x 12
4CD = 84
CD = 84/4
CD = 21 cm

AB/AG = AD/AE
AB/16 = 14/8
AB/16 = 7/4
4AB = 7 x 16
4AB = 112
AB = 112/4
AB = 28 cm

L ABCD = L trapesium
= 1/2 x jml sisi sejajar x t
= 1/2 (AB + CD) AD
= 1/2 (28 + 21) 14
= 49 x 7
= 343 cm^2 (D).

*semoga membantu. sukses selalu ^_^