Tolong bantu dong nomr 1,3,dan 7 sumpah deh akan aku tandai terbaik

no 1
luas trapesium=1/2×(30+45) ×20
=1/2× (75) ×20
=750 cm²
no3.
luas trapesium=1/2×(25+35)×24
=1/2×(60)×24
=720 cm²
no7.
luas layang²=1/2×(d1×d2)
=1/2×(15×19)
=1/2×285
=142,5 cm²

1) bangun 1 = p . l
= 30 .20
= 600 cm²
bangun 2 = a . t/2
= 15 . 20/2
= 150 cm²
luas bangun = 600 + 150
= 750 cm²

3) jumlah sisi sejajar . tinggi /2
(25 + 35) . 24 /2
60 . 24 /2
720 cm²

7) diagonal 1 . diagonal 2 /2
15 . 19 /2
= 142,5 cm²