hip roof cap revisited

[rugbybob]

thread507-79917

Dear Kapitan,

reference the old thread to find the angle of the hip ridge cap......would the valley be the same?

 

[BAretired]

The procedure is the same for a hip or a valley, i.e. find the vector normal to each plane, then take the dot product of the normal vectors to find the angle.

If A and B are the normal vectors of the two planes, then A.B = |A||B|cos[θ] or cos[θ] = A.B/|A||B| where [θ] is the angle between the two planes.

It doesn't matter whether the two planes meet on a hip line or a valley line, the angle is the same.



BA

 

[BAretired]

The procedure is the same for a hip or a valley, i.e. find the vector normal to each plane, then take the dot product of the normal vectors to find the angle.

If A and B are the normal vectors of the two planes, then A.B = |A||B|cos[θ] or cos[θ] = A.B/|A||B| where [θ] is the angle between the two planes.

It doesn't matter whether the two planes meet on a hip line or a valley line, the angle is the same.

BA