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i don't quite understand how to get the length of dm, can someone help?

 Jul 17, 2020
 #1
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I'll give you a few hints:

 

1)    Draw an altitude h from D to a point F on line segment  AM.      h = 2r

 

2)   Find the lengths of  lines AF and FM

 

3)   Use the Pythagorean theorem to find the length of DM.  smiley

 

(btw., ignore those suggested answers; the length of DM is totally different from those numbers.)

 Jul 17, 2020
edited by Dragan  Jul 17, 2020

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