In


a)  If

b)  If
(Hint: Find the value of x) 
Exercises 9, 10
a)
To find:
The value of
Procedure used:
If two angles of a triangle are congruent, then the corresponding sides of the congruent sides are also congruent.
Given:
The given figure is,
Figure
And,
Calculation:
In
b)
To find:
The perimeter of
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