If the area of a right triangle is 15, what is its perimeter?

Cant be determined

Let the two sides of the right angled triangle have lengths a & b. The third side has length =## (a^2 +b^2)^1/2 ##////// use Pythagoras Theorem

Perimeter =## a +b + (a^2 +b^2)^1/2##

Area = ##1/2 ab = 15 ##

ab =## 30 ##

a = ##30/b##

Now P = ##a +b + (a^2 +b^2)^1/2##

= ##30/b + b + ( 900/b^2 + b^2)^1/2##

If we know the value of b or a the perimeter can be determined. So the answer is E