A 19 sided polygon is called : An Enneadecagon Here are the name of the first twelve polygons: 3 triangle 4 Square 5 pentagon 6 Hexagon 7 Heptagon 8 Octagon 9 Nanagon 10 Decagon 11 Hendecagon or Undecagon 12 Dodecagon
10 of the uses of maths are: 1. To measure 2. To pay 3. While driving 4. Calculating sales tax 5. Medical measurements 6. Measuring temperatures 7. While cooking 8. In architecture 9. While dividing the pizza equally amongst ourselves 10. While numbering these points =D
Reciprocals are written with a negative sign and the position of the numerator and the denominator are reversed For example for x or x/1 the reciprocal would be -1/x So for -1/2 reciprocal 2 for 8/4 reciprocal -4/8 or simplifying -1/2 for 12 reciprocal -1/12
Whenever the denominator is 10, the fraction can be written as a decimal by moving the decimal place one place back on the numerator. Remember that in all numbers, we can assume a decimal at the end. For example, 5 is equal to 5.00 and 18 to 18.00.