Given:
In
and
.
To find:
The
.
Solution:
In
,

It means the triangle QRS is an isosceles triangle. We know that the base angles of an isosceles triangle are congruent and their measures are equal.
[Base angles of isosceles triangle QRS]
...(i)
In
,

[Using (i)]



Divide both sides by 2.


Therefore, the
is 33 degrees.