Mathematics
Junior High
Solved
L=2π(r +二分のh)の2πの2はどこからきたのですか?
e
=元 (r+h)?ーπr
=元 (rパ+2rh+h?)-πr
r
2元rh+πh?
トんy
フロアの中心を通る円の半径は
(r+)m であるから,
2
オー2x(r+)
18
=2πr+πh
両辺にんをかけると,
hl=2πrh+πh?.
2
の, 2から,S=he
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