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What is the value of y?

AngelRay  Nov 4, 2017

Best Answer 

 #2
avatar+78762 
+1

 

This triangle is isosceles   with  AB  = AC  ....so....the angles opposite these sides are also =

 

So  angle   (5x)°  = 40...so these two angles sum to 80°

 

So...this means that    2y + 20  must = 100

 

So

 

2y =  80

 

So....y  =  40

 

 

cool cool cool  

CPhill  Nov 4, 2017
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4+0 Answers

 #1
avatar+443 
0

The sum of angles in a triangle adds up to 180 degrees. So we can subtract 60 to get 120 = 5x + 2y. Now we need to solve for y. Y is on the same side of the equation as x, so we need to move the x by subtracting 5x. Then we have 2y = 120 - 5x. Last, we need to divide by 2, as that is the coefficient of y. Now, we have y = 60 - 2.5x.

helperid1839321  Nov 4, 2017
 #2
avatar+78762 
+1
Best Answer

 

This triangle is isosceles   with  AB  = AC  ....so....the angles opposite these sides are also =

 

So  angle   (5x)°  = 40...so these two angles sum to 80°

 

So...this means that    2y + 20  must = 100

 

So

 

2y =  80

 

So....y  =  40

 

 

cool cool cool  

CPhill  Nov 4, 2017
 #3
avatar+443 
+1

Cool! I didn't even see the fact the triangle was isosceles! I grant you one wish. (∩ ͡° ͜ʖ ͡°)⊃━☆

helperid1839321  Nov 4, 2017
 #4
avatar+78762 
0

OK.....I'll have to think a bit about that....!!!!!!

 

 

cool cool cool

CPhill  Nov 4, 2017

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