Solution:
Given,In the figure,
The and are two parallelograms.
The side .
Now, we have,Thus, is .
Therefore, option (1) is correct answer.
In the following figure, ABCD and AEFG are two parallelograms. If ∠C= 60 ° , then ∠GFE is
In the following figure, and are two parallelograms. If then is
In the figure,
The and are two parallelograms.
The side .
Now, we have,Thus, is .
Therefore, option (1) is correct answer.
