pi*9^2*80/360= eching

$$\pi \times { 9 }^{ 2 } \times \frac{ 80 }{ 360 } =$$

Baholash

$$18\pi \approx 56,548667765$$

Yechim qadamlari

2 daraja ko‘rsatkichini 9 ga hisoblang va 81 ni qiymatni oling.

$$\pi \times 81\times \frac{80}{360}$$

\frac{80}{360} ulushini 40 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\pi \times 81\times \frac{2}{9}$$

81\times \frac{2}{9} ni yagona kasrga aylantiring.

$$\pi \times \frac{81\times 2}{9}$$

162 hosil qilish uchun 81 va 2 ni ko'paytirish.

$$\pi \times \frac{162}{9}$$

18 ni olish uchun 162 ni 9 ga bo‘ling.

$$\pi \times 18$$