tolong nomor 6-10 cepat soal nya bsk di kumpulin

=1/2×d1×d2
=1/2×21×16
=1/2×336=168cm2

=2×L/d1+d1
=2×250/10+10
=500/20=25cm

=2×L/(a+b)
=2×3060/70×100
=6120/170=36

=22/7×21×21
=1386m2

=28×L/22
=28/154
=4312÷22=196
=196 akar pangkatin 2
=r=14
=d=14×2=28
=d=28