Why does a carbon atom in a triple bond have sp hybridization?

[tigerwoods99]

Homework Statement

What type of hybridization occurs in the orbitals of a carbon atom participating in a triple bond with another carbon atom?

The Attempt at a Solution

I honestly thought it would be sp³ but it turns out to be sp. Can someone explain this to me? Thanks!

 

[Borek]

What is geometry of sp³, what is geometry of triple bond?

Out of three bonds only one is from hybridized orbital.

 

[chemisttree]

In a triple bond how many pi bonds are there? Pi bonds form from the overlap of what orbitals?