Yeah, that’s transitivity.
It doesn’t matter what order you do it in.
1/2 x b x h = b x 1/2 x h = b x h x 1/2 = h x 1/2 x b = h x b x 1/2.
Think of it like a scale. You’ve got six weights, two are b, two are h, and two are 1/2.
B, H and 1/2 all weigh the same, it doesn’t matter what order you put them on.
Thank you. I remembered that area as 1/2 ??? and then saw in reading the first part of Lockharts Lament that if you box a rectangle inside its base line and height line its area is always one half that rectangles area. This would be no matter the shape of the triangle. My teachers may have taught this but years later I got why the 1/2. Go figure...I drive big rigs for a living; I do calculus and trig in my head all day long to survive.