Why is it true that the sum of the exterior angles of any polygon is 360?

How much is 79 quarters in dollars? How do you analysis ordinal data? Lisa's piggy bank contained 21 dimes nickels and pennies. The total in the piggy bank was 1.21. Lisa removed all the dimes from the piggy bank. This left only 41 cents in the bank. How many pennies we? Who made abacus machine? What is a integral lighting Protection system? What is the best estimate of how lonf a football is feet or yards or foot or yards? What is the thirty feet wall surrounding the base of the pyramid called? What does the math word range mean? What is 0.0346 as a mixed number? what 3 shapes can be assembled to make a trapezoid? A closed plane figure formed by 3 or more line segments that intersect only at their endpoints? Which of the reciprocals of the first 16 natural numbers have a terminating decimal representation and which have a repeating-decimal representation? What is Mercury thermometer use to measure? Is centillion larger than quadrillion? Are inches and feet the same? What is the bottom half and top half of a kernel? What is the difference between fill in and fill out? 4 cards from a deck and 2 of them are hearts 2 are diamonds and the diamonds are next to each other and the sum equals 11 and 1 card is than the sum of 2 cards an no aces what are the cards order? What is the difference between water and fluid? What cognitive skill in critical thinking has to do with the ability to differentiate estimate and infer ideas and concepts?