Wild about PI! Presenters:  Tammy Bell --  Region VI LINCS Coordinator Tammy Cole --  Region VII LINCS Coordinator
This is a circle.
Radius This is the  radius  of a circle. It is a line segment starting from the center of  the circle. The  radius  of thi...
Diameter To find the length across the circle you would double the radius. 4 in. 4 in The line segment that forms across i...
Circumference To find the measurement all around the circle you would multiply the diameter by 3.14 or 3 for a good estima...
Measuring Around the Circle Remember the  radius  is 4  inches . Double it to find the  diameter . 4  in  + 4  in  =8  in ...
Measuring Circles Review Radius Diameter Circumference Measurement ALL around the circle.
Find the  diameter: 5 in . 3 in 7 in. 10 inches 6 inches 14 inches
Find the  Circumference Length around the circle. 5 in . 3 in 7 in. 30 inches 18 inches 42 inches
. . Great Job!
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Circles (3)

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Circles (3)

  1. 1. Wild about PI! Presenters: Tammy Bell -- Region VI LINCS Coordinator Tammy Cole -- Region VII LINCS Coordinator
  2. 2. This is a circle.
  3. 3. Radius This is the radius of a circle. It is a line segment starting from the center of the circle. The radius of this circle is four inches. 4 in.
  4. 4. Diameter To find the length across the circle you would double the radius. 4 in. 4 in The line segment that forms across is called the diameter . DIAMETER 4 in + 4 in = 8 in
  5. 5. Circumference To find the measurement all around the circle you would multiply the diameter by 3.14 or 3 for a good estimate!! Let’s Try!------------------->
  6. 6. Measuring Around the Circle Remember the radius is 4 inches . Double it to find the diameter . 4 in + 4 in =8 in The best estimate of the length around the circle is 24 inches. 8 in x 3 in = 24 in 4 in 8 inches
  7. 7. Measuring Circles Review Radius Diameter Circumference Measurement ALL around the circle.
  8. 8. Find the diameter: 5 in . 3 in 7 in. 10 inches 6 inches 14 inches
  9. 9. Find the Circumference Length around the circle. 5 in . 3 in 7 in. 30 inches 18 inches 42 inches
  10. 10. . . Great Job!
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