Irene Valle // Serger Pepper Designs answered:
I would just sew it like a regular double pointed dart, pivoting at the pointy middle-way spot.
Depending on the fabric you're using, you might need to trim out a little of the seam allowance in correspondence of this point, to release a little bit of tension.
I hope this helps!
Please contact me again if you need me to further help you.
Irene // Serger Pepper Designs