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
60
3
avatar+625 

How many different isosceles triangles have integer side lengths and perimeter 23?

 

I got 9, the webste says 6 - somebody explain it to meeeeeeeeeeeeeeeeeeeeeeeeeeeeee

 

-\(tommarvoloriddle\)

 Jul 3, 2019
 #1
avatar+102447 
+3

Mmm

x+x+y=23

2x+y=23

 

y<2x    otherwise the ends cannot join up.

 

start with tthe middle

8,8,7

9,9,5

10,10,3

11,11,1

 

7,7,9

6,6,11

 

And that is it.

So that is 6

 Jul 3, 2019
 #2
avatar+625 
+3

Ohhh... I get it now melody. Thank you!

tommarvoloriddle  Jul 3, 2019
 #3
avatar+102447 
+1

You are welcome.

Melody  Jul 3, 2019

3 Online Users