Posted by **Natalie** on Sunday, April 26, 2009 at 5:20pm.

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?

- geometry -
**Reiny**, Sunday, April 26, 2009 at 6:30pm
your triangle is right-angled, 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

- geometry -
**Anonymous**, Sunday, April 26, 2009 at 6:43pm
Where did you get 3^2 from?

- geometry -
**Reiny**, Sunday, April 26, 2009 at 6:57pm
I really don't know, lol, must be senility

of course I meant

5^2 + 12^2 = 13^2

the rest is still correct.

- geometry -
**Natalie**, Sunday, April 26, 2009 at 7:00pm
Lol, okay. Thank you very much !

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