 D    D1   D2   H
(1.2  3    6    4)
(1.5  3    6    4)
(1.8  3    6    4)
(2.0  4    6    4)
(2.5  4    8    6)
(3.0  5    9    6)
(4.0  6    10   6)

(1.19 3.18 6.35 3.18)
(1.59 3.18 6.35 3.18)
(1.98 3.18 6.35 3.18)
(2.38 3.18 6.35 3.18)
(2.78 3.18 6.35 3.18)

(1.2  2    4    2)
(1.5  3    6    3)
(1.8  3    6    3)
(2.0  3    6    3)
(2.5  3    6    3)