There is a super easy way to make bunting using squares of fabric rather than cutting lots of triangles.
Decide what size square you wish to use. Cut your fabric into a neat square.
Fold along the diagonal with right sides together and stitch together along one side.
Open up and place the seam in the centre of the back. Press.
Cut the top of the triangle off leaving just the pennant shape. Use the little triangle for another project.
Place the open top into folded bunting tape.
Stitch along the tape close to the fabric flag.
Repeat for all the other flags leaving a space between them that looks good for you and depending on your flag size.