 Oh, Joe, look at the question. I've noticed that when we are finding areas in genometry, the area of a rectangle is fundamental to finding the area of other shapes. Yes. Triangles are half a square. Yes. When we find the areas of other shapes such as hexagon and heptagon, we split the shapes into triangles and find the area by adding the areas of all the triangles the same with circles. Circles a little different. You got to do the limit with circles. When you want to, when you want the area under a curve, you can use an infinite number of rectangles, rectangles, yes, under the curve when we derive the area of shapes, squares, rectangles, all we show up. Yes. So what about the area of a rectangle? What about the area of a rectangle? How do we derive the formula for the area of a rectangle being area equals side times side? We never see the formula for the area of a rectangle being derived or discussed. It's just stated and taken to be true. Is it just taken to be self-evident, axonomic, or is there a way to derive the formula? You derive the formula from area of a triangle, right? Area of a rectangle is twice the area of a triangle, right? That's where you get it. John Bonham fans, yeah, John Bonham. Led Zeppelin died a little too early, right? John Bonham was amazing, by the way. So here's a joke. Sleepy Ways, by the way, I haven't forgotten the music thing, but here's a triangle, right? Now, triangle doesn't have to be Isoci's triangle. If you have a triangle with two sides the same, right? If this is the same as this, you just mirror this along here. You get the same thing as a right angle triangle, and that's a square. So it's x times x, right? But a triangle doesn't have to be Isoci's triangle. Here's a triangle. And the area of a triangle is one half base times height, right? So for square, the base and the height are just x, right? So this would be 1 over 2 x times x, so it's equal to x over 2. And if you have two of them to get the square, you double this. So 2, so area of a square is equal to 2 times the area, oops, area of a triangle, which is equal to 2 times x squared over 2, which is equal to x squared, right? That's the area of a square. Well, area of a rectangle, here's x, or let's call it base times height, or x and y. Let's call it x and y, right? Well, area of this triangle is the same area, same as this. One half base times height, which is equal to one half x times y, which is equal to xy over 2. Well, mirror this, flip it, you get this, right? Is that proportion? This looks bigger. Let me do it. This is my drawing. It looks more legit. All right. So if you do this, then that plus that is 2 times that. So the area of this rectangle, so this is the area of this triangle, and the area of the whole rectangle, is area of the rectangle is equal to area of the triangle times 2. Well, area of the triangle is x over y, x times y over 2 times 2, 2 kills 2, which is just x times y. So area of a rectangle is base times height. Is that, I mean, that's assuming we know what the area of a triangle is. How do we come up with the area of a triangle? I don't know. I haven't looked into the proof of it yet. I've probably had in the past, but I can't remember how to go about it.