It is given that


a)  If


b)  If
find 

a)
To find:
The value of
Solution:
The value of
The measure of sum of angles of a triangle is equal to
Given:
And,
Calculation:
In
Equate the measure of sum of angles of
Substitute
Conclusion:
Therefore, the value of
b)
To find:
The value of
Solution:
The value of
If two triangles are congruent, then all sides of the triangles are congruent.
Given:
And,
Calculation:
In
Substitute
Conclusion:
Therefore, the value of
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