An operation that is done to a value and it stays the same, it is called the "identity property".
Some quick examples:
Adding any number with zero will result in the same number.
Multiplying any number with one will result in the same number.
Hope this helps!
Answer:
Dksizebesiebeisensjzj
Step-by-step explanation:
Disowned
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Answer:
The angle C measures 120 degrees.
Step-by-step explanation:
For a polygon of n sides, the sum of internal angles, in degrees is given by:

Parallelogram
4 sides, so

Two pairs of equal angles
B and D measure 60
A and C measure x. So




The angle C measures 120 degrees.