What did Euclid invent in mathematics?

How does pyramid of number get its name? What is negative 3y equals 2x plus 18? How many letters are there in Bible? How do you make a zero with a diagonal line through it on the keyboard? How many grams is 7 pounds 12 ounces? What is the 15 amendement? The edge of a polyhedron are the polygons which bound the polyhedron? 69 over 4 as a mixed number? What is a metaphor for the word very smart? What is another word for an exact copy start with f? 3.2 as a fraction? Solve the quadratic equation x squared plus 2x plus x to the power of 0 equals 0 giving reasons for your answer? What is double 69? What does it mean when you say the x- variable and y-variable are inversely proportional? What is the square footage of a 14 foot square shed? IS 8003 divisible by 11? What is the weight for a 5 feet 1 inches woman? How many 0 are in a thousand million? How would you write twenty-four is less than five-eighths of a number x? How do you round to the nearest million 46 054 202?