Daabacaaddan, waxa aynu ku tixgalin doonaa sida loo helo radius of sphere ku wareegsan dhululubada saxda ah, iyo sidoo kale bedkeeda oogada iyo mugga kubbada ku xeeran goobtan.
Helitaanka radius of sphere/kubad
Ku saabsan mid kasta ayaa lagu sifayn karaa (ama si kale haddii loo dhigo, ku dheji dhululubo kubbadda) - laakiin mid keliya.
- Xarunta dhexe ee noocan oo kale ah waxay noqon doontaa bartamaha dhululubada, kiiskeena waa dhibic O.
- O1 и O2 waa xarumaha saldhigyada dhululubada.
- O1O2 - dhererka dhululubada (H).
- OO1 = OO2 = h/2.
Waxaa la arki karaa in radius of sphere ku wareegsan (Miyaad tahay), kala badh dhererka dhululubada (OO1) iyo radius salkeeda (O1E) samee saddex xagal toosan OO1E.
Isticmaalka tan waxaan ku heli karnaa hypotenuse-ka saddexagalkan, kaas oo sidoo kale ah radius of the sphere ku wareegsan dhululubada la bixiyay:
Ogaanshaha radius of the sphere, waxaad xisaabin kartaa aagga (S) oogada iyo mugga (V) goob ku xidhan goob:
- S = 4 ⋅ π ⋅ R2
- S= 4/3 ⋅ π ⋅ R3
Fiiro gaar ah: π wareegsan oo siman 3,14.