1.

Construct a parallelogram ABCD such that l(BC)=6.5cm, l(AB)=4.5cm,∠ = °.​

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ANSWER:

A CHEMICAL formula is a way of presenting information about the chemical proportions of atoms that CONSTITUTE a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes ALSO other symbols, such as parentheses, DASHES, brackets, commas and plus and minus signs.



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