M'buku lino, tiwona momwe tingapezere malo ozungulira a cone, komanso malo ake ndi kuchuluka kwa mpira womangidwa ndi chigawo ichi.
Kupeza malo ozungulira / mpira
Aliyense akhoza kufotokozedwa. Mwa kuyankhula kwina, kondomu ikhoza kulembedwa mugawo lililonse.
Kuti tipeze utali wozungulira (mpira) wozungulira pa kondomu, timajambula gawo la axial la cone. Zotsatira zake, timapeza makona atatu a isosceles (kwa ife - ABC), kuzungulira komwe kumakhala kozungulira kozungulira r.
Cone base radius (R) zofanana ndi theka la maziko a makona atatu (BC)ndi ma jenereta (l) - mbali zake (AB и BC).
Utali wozungulira (r)chozungulira chozungulira makona atatu ABC, mwa zina, ndi utali wozungulira wa mpira wozungulira pa cone. Zimapezeka motsatira njira zotsatirazi:
1. Kupyolera mu generatrix ndi utali wozungulira wa maziko a cone:
2. Kupyolera mu kutalika ndi kutalika kwa maziko a cone
msinkhu (h) cone ndi gawo BE pazithunzi pamwambapa.
Mafomula amdera ndi kuchuluka kwa gawo/mpira
Kudziwa radius (r) mukhoza kupeza pamwamba (S) mabwalo ndi voliyumu (V) mbali yozungulira ndi mbali iyi:
Zindikirani: π kuzungulira ndi 3,14.