How many diagonals does a icosogon?

What is 1 meter in scientific notation? What is the length of an altitude of an equilateral triangle with a side length of 9 inches? What is 8.5 percent of 15.00 dollars? Is being inquisitive negative or positive? What is 1-877-582-126 is this a legit number or scam? Can absolute value ever be negative? Why you always look at the clock at 33 past the hour? What shape 180? Give you one picture of 10 tails? When multiplying fraction by a percent what would you do with the percent that has a decimal in it for example three five of 20.2? The volume of a cube is 125 cm³ what is the volume and millimetres cubed? Is 3.14 a imaginary number? What can go into 100 evenly? What is Two thirds minus three fifths? What fractions are the same as 3.4 and 2.3? How many different combinations of sperms are possible in a human male? What is 180 centimeters in feet and inches? What is three fourths of 200? What is the formula for interior angles? What is binary decimal conversion?