Question 1124723


the perimeter of a right angle triangle is

{{{P=a+b+c}}}

if one leg of {{{a=5ft}}} and a hypotenuse of {{{c=13ft}}}, we can find other leg using Pythagorean theorem:

{{{c^2=a^2+b^2}}} 

{{{b^2=c^2-a^2}}} 

{{{b^2=(13ft)^2-(5ft)^2}}} 

{{{b^2=169ft^2-25ft^2}}} 

{{{b^2=144ft^2}}} 

{{{b=sqrt(144ft^2)}}} 

{{{b=12ft}}} 

then

{{{P=a+b+c}}}

{{{P= 5ft+12ft+13ft}}}

{{{P= 30ft}}}