Dhululubo Waa joomateri ay masaaxad saleedyadiisu yihiin goobo, taa oo masaaxada isku xirta salalku tahay laydi golxo leh Bedka xaddidan

${\displaystyle A=2\pi r^{2}\,}$ + ${\displaystyle 2\pi rh\,}$

Habka loo cabiro

(r) waa dhexroorka salka

(h) waa jooga dhululubada

(A) Waa bedka salka ${\displaystyle A=\pi r^{2}\,}$

(P) Wareega Salka waxaana loo cabiri karaa sidaan ${\displaystyle P=2\pi r\,}$

Bedka

• BedKa dhinaca = Wareega Salka × Jooga = ${\displaystyle P\times h}$
• Bedka Salka Sare = ${\displaystyle \pi r^{2}\,}$
• Bedka Salka Hoose = ${\displaystyle \pi r^{2}\,}$
• Bedka Guud = ${\displaystyle (2\times \pi r^{2})+(P\times h)}$

Mugga

Mugga waxaa lagu helaa:

(V) = ${\displaystyle \pi r^{2}h\,}$

Iyadoo la isku dhufto Bedka salka iyo jooga = ${\displaystyle A\times h}$

Sidoo kale Habkaan

Adigoo sidaan u cabira = ${\displaystyle \pi \times \int _{0}^{h}[d(x)]^{2}dx}$