Chaos Tiles

Author: Ed Pegg jr.
Publisher: self published, USA, 1999

Components: 90 tiles (50 convex and 40 concave), rules. Cardboard box.

Players: 1+

This is a puzzle. Your mission is to solve and create some problems, most based on types of shapes, using the 2 types of special tiles, each one made with 5 different edges.

Picture from Boardgamegeek.com.
Two equilateral pentagons,
with angles (80, 160, 60, 140, 100 = Vek)
and (40, 200, 60, 100, 140 = Kay).