And yet you can get meaningful results. Just look at it. Also sorry for using examples!!! Unwitting Division by zero symbolically has fooled many a manipulator into believing false spurious result.

For example, look at the diagonal of a square "d". Now, use the entire perimeter "p" as the line segment. Can we pick any line segment? There is always some relationship between the "traditional" line segment the side of a squareand the one you pick the perimeter, which happens to be 4 times a side.

Can we pick any shape? A given area formula works for all similar shapes, where "similar" means "zoomed versions of each other". All squares are similar area always s2 All circles are similar, too area always pi r2 Triangles are not similar: Some are fat and others skinny -- every "type" of triangle has its own area factor based on the line segment you are using.

Change the shape of the triangle and the equation changes. Why do we need similar shapes to keep the same area equation? Because the "area factor" is based on ratios inside the shape, any shapes with the same "ratios" will follow the same formula.

This intuitive argument may not satisfy a mathematical mind -- in that case, take up your concerns with Euclid. I hope these high-level concepts make sense: But most proofs offer a mechanical understanding: Any right triangle can be split into two similar right triangles.

Drawing a perpendicular line through the point splits a right triangle into two smaller ones. Geometry lovers, try the proof yourself: This diagram also makes something very clear: The smaller triangles were cut from the big one, so the areas must add up.

Our area equation for these triangles is: Divide by F on both sides and you get: Which is our famous theorem! You knew it was true, but now you know why: A triangle can be split into two smaller, similar ones Since the areas must add up, the squared hypotenuses which determine area must add up as well.

This takes a bit of time to see, but I hope the result is clear. How could the small triangles not add to the larger one? Try Any Shape We used triangles in our diagram, the simplest 2-D shape. But the line segment can belong to any shape.IXL's dynamic math practice skills offer comprehensive coverage of Common Core eighth-grade standards.

Find a skill to start practicing! Pythagoras: Pythagoras, Greek philosopher, mathematician, and founder of the Pythagorean brotherhood.

Feb 20, · I was seduced by infinity at an early age.

Georg Cantor’s diagonality proof that some infinities are bigger than others mesmerized me, and his infinite hierarchy of infinities blew my mind. The area of study known as the history of mathematics is primarily an investigation into the origin of discoveries in mathematics and, to a lesser extent, an investigation into the standard mathematical methods and notation of the past.

Before the modern age and the worldwide spread of. Greek philosophy & science has been acclaimed as the most original contribution of the Greeks to the intellectual tradition of the world. "What does change as soon as philosophy appears on the scene is perspective and verbalization, the kind of questions asked.

Understanding by Design, Expanded 2nd Edition. by Grant Wiggins and Jay McTighe. Table of Contents. Chapter 2. Understanding Understanding.

The most characteristic thing about mental life, over and beyond the fact that one apprehends the events of the world around one, is that one constantly goes beyond the information given.

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