Heliotropic.
Because the Greek word polyhedron means many faces and the Greek word polygon means many sides
The Latin word for "Sun" is "Sol". The word "solar" means "about the Sun".
"Daybreak" is a compound word that means when the sun comes up.
A sphere is not a polyhedron because it has no edges, no vertices and no flat faces The word 'polyhedron' means many faces.
Helios was the Greek god of the sun. The word is sometimes used for the sun, in the word "heliocentric" (sun-centred) for example.
Sunset.
The word solar means connected to or relating to the sun.
the part of the earth that you are on faces the sun. (the earth rotates on its axis) When it faces the sun, you see it.
Solar means "about the Sun" in Latin. The Latin word for "Sun" is "Sol".
Taiyo
'sUrya' सूर्य means sun or the sun-god.
The Sun's light is solar. That's what the word 'solar' means.