Who invented heptagon?

How long is the diagonal of the box whose length width and height are 50cm 50cm and 50cm respectively? What Is the point where the two rays form the angle intersect? What shape as 5 sides? What is 700 times 50 times 1? What is ccxciv in romen numerals? Block printing gunpowder and the abacus were developed. porcelain making and black ink painting on silk paper were perfected . the compass was discovered and used to improve the determination of direc? What is MDCC in roman numerals? What are the answers to enrichment 11-1 three dimensional puzzle? How many feet is equal to1 meter? How do you spell one hundred forty one million seven hundred thirty thousand in words? How many times 5 go into 62? What is 5.09x-8.57-3.3x 6.8? How long does it take to travel 93 miles travelling at 70mph? 117 centimeters is how many inches? What number needs to be eliminated to solve the equation 4a 424? What price do farmers get for the peach crops In the third week of June a random sample mean of 6.88 per basket. Assume that the standard deviation is known to be 1.92 per basket. Find a 90 confidence? What letter by convention is used for a variable when another name ain't obvious? what is 12 over q equal 3 over4? What is a series of numbers called? What is 150 degrees F in C?