Top-first, keyhole and 1-flip

Solve a top block first, then the bottom layer; keyhole and 1-flip are its intuitive variants.

Read the overview: Pyraminx methods

1. Approaches

Top-first

Three edges around a tip, then the last layer.

Keyhole

Insert edges through a missing centre.

1-flip

Build the bottom with one edge flipped, fix it in the last step.