+0  
 
0
361
5
avatar+464 

Please help me

 

 Oct 9, 2018
 #1
avatar+878 
+2

I may be wrong, but is the answer 36. If it's correct, just tell me.

 Oct 9, 2018
edited by ant101  Oct 9, 2018
 #2
avatar+107534 
+1

Why do you think it is 36?

Melody  Oct 9, 2018
 #3
avatar+4330 
+3

Hint: Find the interior angle in a decagon.

 

Thought process: Using the formula, 180(n-2), 180(8)=1440-total degrees. We can divide by 10 to find the interior angle of each side, 1440/10=144. 

 

And, if you see the line is cutting exactly in the middle, so we have to x angles. We also have 2 decagon angles, which sum to 144(2)=288.

 

Since there are 360 degrees in a quadrilateral, we yield with the equation of 2x+288=360, 2x=72, x=36 degrees.

 

I hope I didn't make any silly mistakes! 

 Oct 9, 2018
 #4
avatar+464 
+1

Thank you everybody, this is my thought process

 

 Oct 10, 2018
 #5
avatar+4330 
+2

Where are you getting this accurate diagram, when taking a screenshot? Aops?

tertre  Oct 11, 2018
edited by tertre  Oct 11, 2018

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