Attack of Fortified Places. Including Siege-works, Mining, and Demolitions. / Prepared for the use of the Cadets of the United States Military Academy

by James Mercur

[10] Describe the semicircle BMNF. Then

OD : ON :: CH : CM;

l : ON :: v : h.

ON2 = (h2 l2) / v2. (1)

BO : ON :: ON : OF;

h + r : ON :: ON : h - r.

ON2 = h2 - r2 (2)

CF : CH :: CD : CK;

h : v :: √(r2 + l2 : l.

(h2l2/v2) = r2 + l2 (3)