geometry
posted by Natalie .
If the area of Triangle T, sides 5,12, and 13 equals the area of rectangle R, width 3, then what is the perimeter of rectangle R?

your triangle is rightangled, since
3^2+5^2=13^2
so the area is 30
so rectangle R is length x width = 30
3length = 30
length = 10
so its perimeter is 2(10+3) = 26 
Where did you get 3^2 from?

I really don't know, lol, must be senility
of course I meant
5^2 + 12^2 = 13^2
the rest is still correct. 
Lol, okay. Thank you very much !