tolong ya kak No 3-5 sama caranya

no 3
L bangun = L persegi panjang + L trapesium
= (p x l) + 1/2(a+b)t
= (16 x 6) + 1/2(16-7+16)14-6
= 96 + (1/2 x 25 x 8)
= 96 + 25 x 4
= 96 + 100
= 196 cm persegi

no 4
L bangun = L persegi panjang + L 1/4 lingkaran
= (p x l) + (1/4 x π x r x r)
= (28 x 42-28) + (1/4 x 22/7 x 28 x 28)
= (28 x 14) + (22 x 28)
= 392 + 616
= 1008 cm persegi

no 5
L bangun = L jajar genjang + L layang-layang
= (a x t) + (1/2 x d1 x d2)
= (45 x 17) + (1/2 x 32 x 40)
= 765 + (16 x 40)
= 765 + 640
= 1405 cm persegi

*semoga membantu. sukses selalu ^_^