簡約 pi*((0.15)/2)^2

解

簡約

π \cdot (\frac{0.15}{2})^{2}

0.01767 \dots

解答ステップ

π (\frac{0.15}{2})^{2}

(\frac{0.15}{2})^{2} = \frac{0.1 5 ^{2}}{2 ^{2}}

= π \frac{0.1 5 ^{2}}{2 ^{2}}

分数を乗じる:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{0.1 5 ^{2} π}{2 ^{2}}

0.1 5^{2} = 0.0225

= \frac{0.0225 π}{2 ^{2}}

2^{2} = 4

= \frac{0.0225 π}{4}

数を乗じる:

0.0225 \cdot 3.14159 \dots = 0.07068 \dots

= \frac{0.07068 \dots}{4}

数を割る:

\frac{0.07068 \dots}{4} = 0.01767 \dots

= 0.01767 \dots