Can a tessellation be created with a circle?

How many sq ft will 12000 btu cool or heat? What is 5.7 as a fraction? Can you show that you can find the radius of a sphere with a volume of CDXII cubic inches? 2x-y equals 5 4x plus y equals 4? Equate 20000 a year to dollars per hour? What is a geometric figure whose surface is at all points equidistant from the center? What is the multipicand? How do you calculate radius when the have no radius and no diameter? What was the selective service classification 4y? How many nubers are in octillion? What are two factors of 21 that when added together equal 21? What is the reading between 2 and 3? How many right angles are formed when three perpendicular lines intersect? How much Time is 1.8 hours? What is eleven thirds in simplest form? What is a two masted square rigger? What are box-n-whisker plots used for? How many hours in 19 days? What is 2x10-1? What does tonne measure?