S = πr²
d = 2r
r = d/2
Отсюда
S = π(d/2)²
S = (πd²)/4
121π² = πd²/4
d²=484π
d=22√π
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
S = πr²
d = 2r
r = d/2
Отсюда
S = π(d/2)²
S = (πd²)/4
121π² = πd²/4
d²=484π
d=22√π