Ezibunxantathu olubuxande Iphiramidi umthamo sokubala

Iphiramidi into emacala yenziwa ngokuthi uyidibanise isiseko polygonal kunye a Incopho, ebizwa enkcochoyini. Ngamnye ngohlangothi isiseko kunye nefom ngamafelandawonye unxantathu, ngokuba ubuso osecaleni. Yinto eqinileyo gqiba noseko polygonal. —

V	=	1	Sh
		3

h - Ukuphakama yephiramidi
S - Ummandla base

Iphiramidi rhoqo na iphiramidi rhoqo ogama nesiseko yipolygon.

V	=	na2h
		12 tg(	180°	)
			n

h - Ukuphakama yephiramidi
a - Icala base
n - Inani icala isiseko

Iphiramidi elingunxantathu rhoqo na iphiramidi kunye unxantathu lasekunene-ijike xa noseko lwalo extruding ukuya kwindawo enye.

h - Ukuphakama yephiramidi
a - Icala base

Iphiramidi rhoqo buxande na iphiramidi kunye square kwisiseko kwaye ubuso oonxantathu ayisoselisi ngokulinganayo.

V	=	1			ha2
		3

h - Ukuphakama yephiramidi
a - Icala base

Tetrahedron into emacala elakhiwe yobuso ezine ezibunxantathu, elintlangothi ezintandathu ngqo, kunye neekona ezine ivertex.


a - Pheleni kwe tetrahedron