What is one of the properties of a parallelogram, What means diagonals bisect each other, Does this have two pairs of parallel and equal sides, What can we say about ( 30°-60°-90°), What is the what is called the line facing the right angle, What is the definition of (L)//(D) and (M)//(D) , If we have (-0.5+10) what should be the answer negative or positive, If we have (2*7)0=, If we have same numbers with different exponents what should we do, What should we do with this number to become in scientific notations(3427*10*4)=.

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