How many lines of symmetry does an eight sided shape how?

What is the use of a mean median mode? If your perfect square is 300 what sport are you playing? Interior angle of 173 degrees? Why can you calculate (-20) plus ( plus 8) by calculating 20-8 and taking the opposite of your result? What is a 3D shape that has 10 faces called? What is the wall thickness of 700mm diameter GRP pipe? What is 1.357 times 10 to the 9th? What do you call an ant that's good at math? Which number is a multiple of 3 is less then 30 and has a five in the ones place? Does a triangle have point symmetry? What is 11011 binary? What is - 4 plus 5 - 7 equals? How do you round 6.25 to the nearest tenth? How many eights equal one inch? What is cubed of 1.09? How many exterior angles are there with respect to each vertex of a triangle? What is the square root of 8292? What is the slope of line with a slope intercept equation y-2-x? What is the lifespan of a man? What is 06.19.1983 in roman numeral?