y>=0 and a>=x and a h_1 + h_2 x>=a y + h_1 x and x>=0

right trapezium

(0, 0) | (a, 0) | (a, h_2) | (0, h_1)

4

a>0 and h_1>0 and h_2>0

sqrt(a^2 + h_1^2) | sqrt(a^2 + h_2^2)

A = 1/2 a (h_1 + h_2)

x^_ = ((a (h_1 + 2 h_2))/(3 (h_1 + h_2)), 1/3 (h_2 + h_1^2/(h_1 + h_2)))

J_x invisible comma x = 1/12 a (h_1 + h_2) (h_1^2 + h_2^2)

J_y invisible comma y = 1/12 a^3 (h_1 + 3 h_2)

J_zz = 1/12 a (a^2 (h_1 + 3 h_2) + (h_1 + h_2) (h_1^2 + h_2^2))

J_x invisible comma y = -1/24 a^2 (h_1^2 + 2 h_2 h_1 + 3 h_2^2)

r_x = sqrt(h_1^2 + h_2^2)/sqrt(6) r_y = (a sqrt((h_1 + 3 h_2)/(h_1 + h_2)))/sqrt(6)

a | h_2 | sqrt(a^2 + (h_2 - h_1)^2) | h_1

p = sqrt(a^2 + (h_2 - h_1)^2) + a + h_1 + h_2

max(sqrt(a^2 + h_1^2), sqrt(a^2 + h_2^2))

χ = 1

convex laminae | polygonal laminae | quadrilateral laminae | scalene quadrilateral laminae