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Step-by-step explanation:
g, h — properties of isosceles triangles
a — supplementary to a given angle
e — corresponding to angle a
c — same side interior with angle b
d — supplementary to a given angle and angle e
r — supplementary to angle p
s — corresponding to angle p
k — supplementary to angle h
f, m, p — triangle sum theorem
e — vertical to angle c
b — vertical to a given angle