Предмет: Геометрия, автор: Йооооооуууу

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Автор ответа: borisovaaleksan

1. $a_{3}=2 \sqrt{3}r=2 \sqrt{3}* \sqrt{3}= 2*3=6$
$P_{3}= 3a=3*6=18$
$S_{3}= \frac{ a^{2} \sqrt{3} }{4} = \frac{36 \sqrt{3} }{4}=9 \sqrt{3}$

3. C=2 $\pi R$ . $8 \pi = 2 \pi R; R=4$
$a_{4} = \sqrt{2}R= \sqrt{2} *4=4 \sqrt{2}$
$P_{4}= 4a=4*4 \sqrt{2} =16 \sqrt{2}$

borisovaaleksan: стоп, не туда нажала. сейчас допишу до конца

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