G
all letters
g y h
Convex polygons with congruent sides and congruent angles are called regular polygons.
None in the Roman alphabet.
It depends on the alphabet:Latin = NONEGreek = ΔCyrillic = NONEHebrew = ם (depending on the font)Arabic = NONEKorean = NONEThere are also a few chinese characters that can loosely be described as polygons, such as: 凸凹口囗
None. They either consist of curved sides or are not closed shapes (have lines "sticking out").
Sure
Regular polygons are always convex by definition.
The letters X L T
They are both convex polygons.
A concave polygon has at least one interior angle greater than 180 degrees. A convex polygon has none of those.
6,776 growing, including convex and concave polygons, constructible polygons, cyclic polygons, and so much more