dihedral angle

line font diagram brand cartoon text drawing logo presentation document sketch circle artwork number dihedral angle vector isolated white angle intersecting planes half-planes chemistry clockwise atoms geometry union line edge hyperplanes flying machine starboard port main wings axis mathematical cartesian coordinates polymer physics scientific chain points kinematic chains amino acids protein structure bond vectors interval orientation vector cosine sign sine formula quadruple alkane stereochemistry conformational isomerism configuration energy diagram n-butane function molecule chemical bond molecular conformation