Online Course Discussion Forum

math challenge II-A Geometry 8.30

 
 
Picture of Zeyin Wu
math challenge II-A Geometry 8.30
by Zeyin Wu - Friday, October 29, 2021, 6:55 AM
 

Can I have a diagram of this question, please? Besides, why is DN 5*sqrt 3? Shouldn't it be the hypotenuse of triangle CDN? 

 
Picture of John Lensmire
Re: math challenge II-A Geometry 8.30
by John Lensmire - Friday, October 29, 2021, 12:24 PM
 

Here's a quick diagram that I recently shared (it's not very accurate to the numbers in the problem, but still gives an idea of how all the points are related to each other):


In particular, it should help better understand what M and N being feet from perpendicular lines from B and C respectively means in the problem.