Answer:
[tex]\pi \ \binom{10}{2}^{2} - \pi {3}^{2} = 16\pi \: m^{2} [/tex]
[tex] \frac{1}{2} \pi \binom{12}{2} ^{2} - \frac{1}{2} \pi \binom{12}{2}^{2} \times 2 = 9\pi \: dm^{2} [/tex]
[tex]8 \times 8 - 2 \times 2 \times 4 = 48 \: dm ^{2} [/tex]
[tex]10 \times 10 - \pi \binom{10}{2}^{2} = 100 - 25\pi \: dm ^{2} [/tex]
[tex]4 \times (6 - 2) \times \frac{1}{2} + (7 - 4)2 \times \frac{1}{2} = 11 \: dm ^{2} [/tex]
Step-by-step explanation:
Hope it helps
