alice.henly
Course Students
 
Posts: 1
Joined: Sun May 11, 2014 8:16 am
 

Diagonal of a Parallelogram

by alice.henly Mon Aug 25, 2014 7:48 am

On page 261 (question 11c) of the ETS OG, they ask for the length of the diagonal of a parallelogram. I don't see a formula for calculating the diagonal in the OG. It also doesn't seem to be in the MP Geometry guide. Did I miss it?

Thanks
tommywallach
Manhattan Prep Staff
 
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Joined: Thu Mar 31, 2011 11:18 am
 

Re: Diagonal of a Parallelogram

by tommywallach Tue Aug 26, 2014 9:37 pm

Hey Alice,

There is no formula that doesn't involve trigonometry. In the question you're talking about, they give you extra information that allows you to simply solve for the diagonal of the right triangle. They'd have to do that on the real test, too.

-t