sqrt(3) a + 3 sqrt(3) x + 3 y>=0 and 3 sqrt(3) x<=sqrt(3) a + 3 y and 6 y<=sqrt(3) a or sqrt(3) a + 6 y>=0 and 3 (sqrt(3) x + y)<=sqrt(3) a and sqrt(3) (a + 3 x)>=3 y

Magen David | Mogen David | shield of David | six-point star | six-pointed star | Solomon's seal | star of David

(0, a/sqrt(3)) | (-a/6, a/(2 sqrt(3))) | (-a/2, a/(2 sqrt(3))) | (-a/3, 0) | (-a/2, -a/(2 sqrt(3))) | (-a/6, -a/(2 sqrt(3))) | (0, -a/sqrt(3)) | (a/6, -a/(2 sqrt(3))) | (a/2, -a/(2 sqrt(3))) | (a/3, 0) | (a/2, a/(2 sqrt(3))) | (a/6, a/(2 sqrt(3)))

12

a>0

A = a^2/sqrt(3)

x^_ = (0, 0)

J_x invisible comma x = (11 a^4)/(216 sqrt(3))

J_y invisible comma y = (11 a^4)/(216 sqrt(3))

J_zz = (11 a^4)/(108 sqrt(3))

J_x invisible comma y = 0

r_x = 1/6 sqrt(11/6) a r_y = 1/6 sqrt(11/6) a

a/3 | a/3 | a/3 | a/3 | a/3 | a/3 | a/3 | a/3 | a/3 | a/3 | a/3 | a/3

p = 4 a

R = a/sqrt(3)

(2 a)/sqrt(3)

concave laminae | equilateral polygonal laminae | polygonal laminae | regular star polygonal laminae