How many isosceles triangles with whole-number length sides have a perimeter of 30 units?
+514 if x and y were the side lengths, then, \(2x+y=30\)
Here are all the lengths but we'll take out the ones that don't satisfy the triangle inequality:
1,1,28
2,2,26
3,3,24
4,4,22
5,5,20
6,6,18
7,7,16
8,8,14
9,9,12
10,10,10
11,11,8
12,12,6
13,13,4
14,14,2
Final answers:
8,8,14
9,9,12
10,10,10
11,11,8
12,12,6
13,13,4
14,14,2
7 of them
