C_1: (1, 12)
D_1: (2, 12)
poly1_1, i_1, j_1, l_1, m_1, E_1, F_1 = Polygon(C_1, D_1, 4)
G_1: (3, 12)
poly2_1, n_1, p_1, q_1, r_1, H_1, I_1 = Polygon(D_1, G_1, 4)
J_1: (4, 12)
poly3_1, s_1, t_1, a_1, b_1, K_1, L_1 = Polygon(G_1, J_1, 4)
M_1: (5, 12)
poly4_1, f_1, g_1, h_1, i_2, N_1, O_1 = Polygon(J_1, M_1, 4)

Tool: Angle
Angle[ <Point> ]
Input: L_1
Output: α, A, U_1, f, j

Move

Turn

p = Circle(L_1, 10)
U_1 = Point(p)
j = Segment(U_1, L_1)
A = Rotate(U_1, 50°, L_1)
α = Angle(U_1, L_1, A)
f = Segment(L_1, A)