Question 1074043
The first:
Perimeter = 2w+2l
49 = 2w+2(4.5)
2w+9 = 49
2w = 40
w = 20
Now, what do you want to do with the second triangle? They are similar in what way? Is this a ratio problem? I can't read minds, you've got to tell me what it is you are looking for.