Answers

2015-01-11T13:56:01+08:00
14cm, 14cm and 17cm

It is an isosceles triangle. 
0
Solution:

let y be the 2 equal sides and
x be the base or the third side

y= x-3

so, P = 2y + x
45= 2y + x
= 2(x-3) + x
= 2x-6 + x
= 3x-6
3x= 45+6
(3x= 51) 1/3
x = 17

y= x-3
= 17-3
= 14cm