Degree

Degree formula
\( \theta \;=\; 2 \cdot arccos \left( \dfrac{ r - h }{ r } \right) \) (Hydraulic Radius of a Partially Full Pipe (Less than Half Full)), (Hydraulic Radius of a Partially Full Pipe (More than Half Full))
Symbol	English	Metric
\( \theta \) (Greek symbol theta) = degree	\( in^4 \)	\( mm^4 \)
\( r \) = radius	\( in \)	\( mm \)
\( h \) = height or depth of liquid	\( deg \)	\( rad \)