1)  What is the formula for circumference of a circle given the diameter ? a) C = π r b) C = 2 π r c) C = 2 π d d) C = π d 2) What is this called? a) Diameter b) Radius c) d) 3) What is this called?(in blue color ) a) Circumference b) Radius c) Chord d) Diameter 4) If my diameter is 19 inches, what is my radius? a) 9.5 inches b) 8 inches c) 10 inches d) 9 inches 5) A circular swimming pool is 21 feet in diameter.How many feet around is the pool? a) 65.94 ft b) 60.94 ft c) 55.94 ft d) 45.94 ft 6) choose all of the correct answers .The diameter of a circle is: a) the distance from an edge of a circle to another edge through the center. b) The measurement around the circle. c) The distance from the center of the circle to an edge of a circle d) line that cuts the circle in half from end to end

Circles and circumference

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