\[\boxed{\text{7.57.}}\]
\[\angle\text{KZL} = 20{^\circ};\ \ \angle\text{LZM} = 30{^\circ};\ \]
\[\angle\text{KZM} = 50{^\circ};\ \angle\text{MZN} = 75{^\circ};\ \]
\[\angle\text{LZN} = 105{^\circ};\]
\[\angle\text{KZN} = 115{^\circ};\ \angle NZO = 15{^\circ};\ \]
\[\angle OZT = 60{^\circ};\ \angle TZM = 130{^\circ};\ \]
\[\angle TZL = 160{^\circ};\]
\[\angle OZN = 15{^\circ};\ \angle OZM = 90{^\circ};\ \]
\[\angle OZL = 120{^\circ}.\]
\[\textbf{а)}\ \angle TZO < \angle TZM < \angle TZL.\]