+0  
 
0
46
3
avatar

https://vle.mathswatch.co.uk/images/questions/question16843.png

 

I need help with this

 Nov 18, 2020
 #2
avatar
+1

 

It's a regular 12-agon so PQ and QR are equal. 

 

The sum of the interior angles of a polygon with n sides is (n – 2) • 180 

In this case, 10 • 180 = 1800 

There are 12 angles so one of them is 1800/12 = 150 

 

So angle PQR is 150o  

 

The sum of the angles of a triangle is 180o  

 

So the total of the two small angles is 180 – 150  =  30  

 

So each of the small angles is 15o  

 Nov 18, 2020
 #3
avatar
0

angle PRQ = 1/2(360 / 12) smiley

 Nov 19, 2020

54 Online Users

avatar
avatar
avatar
avatar
avatar
avatar