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please help me humans of earth!!!

 

 Apr 29, 2020
 #1
avatar+20981 
+1

Since triangle(PQR) is an isosceles triangle, T will be the midpoint of PR; thereore, PT = 0.7 m

Also, QT bisects angle(PQR) so angle(PQT) = 19o.

sin(19o) = 0.7 / PQ   --->   PQ  =  0.7 / sin(19o)   --->   PQ  =  .....

 Apr 29, 2020
 #2
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+1

 

angle PQR is 38o so angle PQT is half of that, or 19o  

 

since angle PQT is 19o that means angle QPT is 71o 

 

PT is half of 1.4 m, or 0.7 m 

 

 0.7 m

———  =  cosine 71o  

  PQ 

 

             0.7 m            0.7 m

PQ  =  ——–—  =  ——–——  =  2.1500 m rounded to two decimal places is 2.15 m 

           cos 71o        0.32557 

 Apr 29, 2020

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