Question

find the area of a triangle using A = 1/2bh where b= 16mm and h= 5mm

Answer 1

This is pretty simple multiplication.
First multiply 1/2 * 16 to get 8
Next multiply 8*5 to get 40

So the area of your triangle is 40mm

Answer 2

The formula is right there in the question. Just write '16' in place of 'b' and write '5' in place of 'h', then do the multiplication and you have the area. / / / If you don't get 40 square mm then you have a mistake somewhere.