Both of these images are from Islamic origin. The darker image on the left
comes from a painting by Jorge
Pardo, in 1981. The book is called
"50 Texas Artists" published by
Chronicle Books in 1986.
The brighter image on the right side is
in the book
"Gnomon" by Midhat J. Gazale.
The book is published by Princeton University
press. These
design, which can be formed from
congruent equilateral triangles,
are known as a polyiamond. Jay
Kappraff shows a similar design in the book "Connections" (Figure 5.40 on page 203).
The book "Connections" was published by McGraw Hill in 1990.
The sketch on left is
taken from "Geometry, art and nature" a
webpage by
Mrs. Joan Brindle.
Jali screen at Amber Palace, Jaippur, India.
