What are the function of ceramic square?

If radius of a circle is 9 centimeters what would be the circumference? How many sq ft is 500 sq meters? Are the following statements true. 1.If a polygon has four sides it is a quadrilateral 2. If a polygon is not a quadrilateral then it does not have four sides? What shape has 4 faces 6 edges and 4 vertices? What does length times height x width equal? How many sides does a regular polygon have if its interior angles are 177 degrees each? What is the area of a circle with a radius of 3 cm rounded to the nearest tenth? What is a shape of the top of a butte? What is the name of a 4-sided polygon? Can a human draw a perfect circle? How many points in one acre? What is an example of something 150 sq ft? This shape has 1 vertex 1 cricular face and 1 curved face? How much is 100000000 side polygon? What kind of line is a horizontal line? What tools or symbols you use to represent vectors? What pyramid stands at 481 feet? How many square feet does one gallon of floor stain cover? What size room is 200 x 300 square feet? 0.18 acres equals how many square feet?