Tolong dijawab no 7 dan di isu caranya guys...

L. trapesium = 1/2 x jumlah sisi sejajar x tinggi
= 1/2 x ( 30 + 50 ) x 40
= 1/2 x ( 80 ) x 40
= 1/2 x 3200
= 1.600 cm*2
Jawaban : a. 1.600 cm*2

Luas = 1/2 . (t1 + t2) . 40
= 1/2 . (30+50) . 40
= 1/2 . 80 . 40
= 40 . 40
= 1600 cm2