Name of quilt block
 

What is it called when you cut squares into triangles and mix up, making new squares/blcks?

Half square triangles

Disappearing blocks? You make the HSTs (or squares), sew those into a block, cut the block up and rearrange????

Can you find a picture or draw one? Look up HST and see if that is it.

Jenny from Missouri Star does a lot of this. She has lots of disappearing blocks. Perhaps someone can direct you to one of those sites.

Craftsy has a free printable card that shows how to cut several disappearing blocks.
https://www.craftsy.com/quilting/pat...le-card/187313

Disappearing n8ne patch, disappearing hourglass...etc.

Here are a couple sites that do the technique: http://maryhueyquilts.blogspot.com/2...rifocals%21%29

Lots of ideas in this lady's newsletter: https://mypatchwork.wordpress.com/ca...ideo-tutorial/