mencari luas yang berbayangan dari nomor 6-10

6. L=2×1/2×3×6
=2×1/2×18
=1/2×36
=18

7. L○=1/2×22/7×7×7 L segitiga=1/2×14×4
=1/2×154 =1/2×56
=77 =28

=77+28=105

8. L□=21×21 L○=22/7×10,5×10,5
=441 =22/7×11025
=3465
=3465-441=3024

9. D=5,5+5,5+10=21 L=3,14×5
r=10,5 =3,14×25
L=22/7×10,5 =78,5
=22/7×11025
=346,5
=346,5-78,5=2680

10.L□=17×14 L○=1/2×22/7×7×7
=238 =1/2×154
=77
=238+77=315