Question 114241
No, that's not correct.
The perimeter is the sum of the sides
{{{P=5+3+4=12}}}
The area of a triangle is 
{{{A=(1/2)bh}}}
where b is the base and h is the height. 
You can find it by letting b=3 and h=4, or
by letting b=4 and h=3. 
The answer will be the same.
{{{A=(1/2)bh=(1/2)(3)(4)=(1/2)(4)(3)=6}}}