web2.0calc
 
+0  
 

 PLease help the other explanations are wrong

0
637
3
avatar

In triangle PQR, PQ=13 , QR=14  , andPR=15 . Let M be the midpoint of QR . Find PM.

Thanks

Also shout out to CPhill

MElody

Alan

heureka

hecticar

You guys are the best and others too many to list

 Jan 16, 2021
edited by Guest  Jan 16, 2021

Best Answer 

 #2
avatar+1639 
+2

In triangle PQR, PQ=13, QR=14, and PR=15. Let M be the midpoint of QR. Find PM.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PM = 1/2 [sqrt(2*152 + 2*132 - 142)]

 

PM = 2√37

 Jan 16, 2021

3+0 Answers

 #1
avatar
0

Law of Cosines on triangle PQM

PQ^2 + PM^2 - QM^2 = 2*PQ*PM*cosQPM

Law of Cosines on triangle RPM

PR^ 2+ PM^2 - RM^2 = 2*PR*PM*cosRPM

==> PM = 7*sqrt(3)

 Jan 16, 2021
 #2
avatar+1639 
+2
Best Answer

In triangle PQR, PQ=13, QR=14, and PR=15. Let M be the midpoint of QR. Find PM.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PM = 1/2 [sqrt(2*152 + 2*132 - 142)]

 

PM = 2√37

jugoslav Jan 16, 2021
 #3
avatar
0

Thank You so much 2sqrt37 was right Also how do you like something I can't figure it out

Guest Jan 16, 2021

7 Online Users

avatar
avatar

Top Users

avatar+128408 CPhill moderator
avatar+118608 Melody moderator
avatar+33614 Alan moderator
avatar+14903 asinus moderator
avatar+9519 MaxWong
avatar+3144 admin administrator
avatar+2440 GingerAle
avatar+1763 tomtom
avatar+1445 bader
avatar+1037 parmen
avatar+1030 blackpanther

Sticky Topics