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Question Number 12895 by tawa last updated on 06/May/17

Commented by tawa last updated on 06/May/17

$$\mathrm{God}\mathrm{bless}\mathrm{you}\mathrm{sir}.$$

Commented by b.e.h.i.8.3.4.1.7@gmail.com last updated on 07/May/17

$$S=(4+\frac{12}{2}-1)\times 4=36$$

Answered by ajfour last updated on 06/May/17

$$[\frac{\pi }{4}{\left(12\right)}^2-\frac{1}{2}\left(12\right)\left(12\right)]-[\frac{\pi }{4}{\left(4\right)}^2-\frac{1}{2}\left(4\right)\left(4\right)]$$$$=(36\pi -72)-(4\pi -8)$$$$=32\pi -64.$$

Commented by tawa last updated on 06/May/17

$$\mathrm{God}\mathrm{bless}\mathrm{you}\mathrm{sir}$$

Commented by chux last updated on 07/May/17

$$\mathrm{please}\mathrm{explain}\mathrm{further}$$

Commented by ajfour last updated on 07/May/17

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