It breaks down like this the 90mm gun of the M 36 will with an AP round penetrate.
149 mm with 0 armor slope
115 mm with 30 degrees of armor slope
65 mm with 60 degrees of armor slope
The King Tiger ( Pz VIB ) has 185 mm of front turret armor with a 10 degree slope. The upper hull has 150 mm with 50 degree slope. The lower hull has 100 mm with 50 degree slope. Thus no armor penetration. these figures represent gun penetration out to 100 meters. I believe a slope of 60 degrees effectively doubles your armor thickness.
Hope it helps
[This message has been edited by Chris5110 (edited 11-24-2000).]
[This message has been edited by Chris5110 (edited 11-24-2000).]