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Can I get some help on II-A 4.25

 
 
Picture of Bober Yang
Can I get some help on II-A 4.25
by Bober Yang - Saturday, October 10, 2020, 4:59 PM
 

I don't know what techniques that I can use to find the formula

Do I use Pythagorean theorem or other?

Can I get some help, and that would be great

 
Picture of Dr. Kevin Wang
Re: Can I get some help on II-A 4.25
by Dr. Kevin Wang - Saturday, October 10, 2020, 6:59 PM
 

This question is about a parallelogram: given the two side lengths $a$ and $b$, and one of the diagonals $d$, find a formula for the area of the parallelogram.

See my answer to Kevin Song's question at this link:

https://classes.areteem.org/mod/forum/discuss.php?d=755

 
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