INTRODUCTION TO EDUCATIONAL ADVERTISING, OR LOGO-PUZZLES
Click at different places on the screen. This is my Logo. It's a rectangle cut diagonally, and a quarter of ellipse. (Ellips is a shadow of a circle, projection) WHICH AREA IS BIGGER, COLORED OR WHITE ? Hint: Start with a square, then use the above definition of ellipse. Answer: Same! Moreover, there are two pairs of equal areas (which ones?)