We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
233
2
avatar+210 

How many distinct triangles can be formed by selecting three vertices of a regular octagon? (Triangles with different vertices are considered distinct even if they are congruent.)

 Oct 15, 2018
 #1
avatar+100439 
+2

EDIT 

 

Like the guest says  8C3    =  56  !!!

 

 

cool cool cool

 Oct 15, 2018
edited by CPhill  Oct 15, 2018
edited by CPhill  Oct 15, 2018
 #2
avatar
+2

But he/she says "by selecting 3 vertices of a regular octagon". So, shouldn't the number of distinct triangles be:

8C3 = 56 ???

 Oct 15, 2018

13 Online Users

avatar