Euler was the first person to use Radians in trigonometry. The circumference of a circle is 2 Pi, and Euler defined 360 degrees (of a circle) to be 2 Pi Radians. For the watch above, consider 0 (or 360 degrees) as the “horizontal plane”, represented by Pi and 2 Pi; with the vertical “90 degrees” point being Pi/2, and 270 degrees of the circle representing 3/2 Pi. Clear as mud? Mathematics has beauties of its own.  J.W.A. Young Genuine 100% chromonometer (a watch)  Archie Bunker Either this man is dead or my watch has stopped.  Groucho Marx I could either watch it happen, or make it happen.  Elon Musk I xeroxed my watch. Now I can give away free watches.  Steven Wright I am an expert in Higher Level Math: You + God = Enough  Zig Ziglar Cauliflower is nothing but cabbage with a college education.  Mark Twain Put all your eggs in one basket, and then watch that basket.  Mark Twain A college education shows a man how little other people know.  T.C. Hailburton I might survive a few days at sea. Probably not as long as Pi.  Suraj Sharma If a man's wit be wandering, let him study the mathematics.  Francis Bacon Mathematics is the science which uses easy words for hard ideas.  James Roy Newman Example is the school of mankind, and they will learn at no other.  Edmund Burke God made the Idiot for practice, and then He made the School Board.  Mark Twain I was a great student at a great school, Wharton School of Finance.  Donald Trump In mathematics, you don't understand things. You just get used to them.  John von Neumann Like the crest of a peacock, so is mathematics at the head of all knowledge.  Indian Proverb By the time a man is wise enough to watch his step, he's too old to go anywhere.  Billy Crystal Let us grant that the pursuit of mathematics is a divine madness of the human spirit.  Alfred Whitehead When I was in high school, I earned the pimple award and every other grossout award.  Jack Nicholson Show me a Jewish boy who doesn't go to medical school and I'll show you a lawyer.  Milton Berle I'm very proud of my gold pocket watch. My grandfather, on his deathbed, sold me his watch.  Woody Allen If I feel unhappy, I do mathematics to become happy. If I am happy, I do mathematics to keep happy.  Alfred Renyi I must study politics and war that my sons may have the liberty to study mathematics and philosophy.  John Adams I grew up in an Irish Catholic family, and I think they force you to watch every James Cagney movie.  Jimmy Fallon There are people who make things happen, those who watch what happens, and those who wonder what happened.  Unknown Mathematics is distinguished from all other sciences except only ethics, in standing in no need of ethics.  Charles Peirce Smartness runs in my family. When I went to school I was so smart my teacher was in my class for five years.  George Burns Do not attack me with your watch. A watch is always too fast or too slow. I cannot be dictated to by a watch.  Jane Austen Change your belief that struggle and striving are necessary for success and watch how smoothly everything can go.  Unknown Mathematics is the only science where one never knows what one is talking about nor whether what is said is true.  Bertrand Russell The most painful thing about mathematics is how far away you are from being able to use it after you have learned it.  James Newman There are advantages to being President. The day after I was elected, I had my high school grades classified Top Secret.  Ronald Reagan In my last year of school, I was voted Class Optimist and Class Pessimist. Looking back, I realize I was only half right.  Jack Nicholson I went to a Catholic boys' school for a year, but that was to play hockey. Religion class was quite contentious for me.  Keanu Reeves I am like a pelican of the wilderness: I am like an owl of the desert. I watch, and am as a sparrow alone upon the housetop.  Bible My son really has the spirit of Valentine's Day. When he was in college, he used to send his mother a heartshaped box of laundry.  Milton Berle I tell them that if they will occupy themselves with the study of mathematics they will find it the best remedy against the lusts of the flesh.  Thomas Mann I was thrown out of college during my freshman year, for cheating on my metaphysics final  I looked within the soul of the boy sitting next to me.  Woody Allen If it's green, it's biology. If it stinks, it's chemistry. If it has numbers, it's math. If it doesn't work, it's technology.  Unknown see also College & Engineering & Shopping Sections Accurate Pie Chart Apple Pi Best Clock Ever Bike Chain Clock Cursor Clock Dancing Mathematician Digital Analog Clock Edible Pi Math in Africa Math Clock Math Dice Mathematician’s Truck Newfoundland Digital Clock Pi Chart Pi Number Pie Pumpkin Pi Solar System Watch Spider Time Time Flies Who Cares Clock Window Sundial Word Puzzle Clock Working Round The Clock 
