What is the perimeter of a triangle with corners at #(7 ,3 )#, #(9 ,5 )#, and #(3 ,3 )#?
Well, perimeter is simply the sum of the sides for any 2D shape.
We have three sides in our triangle: from
The lengths of each are found by Pythagoras' theorem, using the difference between the
For the first:
For the second:
And for the final one:
so the perimeter is going to be
or in surd form,