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Circles – Circumference and Area

Circles – Circumference and Area. Circumference – the distance around a circle. Circles – Circumference and Area. Circumference – the distance around a circle.

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Circles – Circumference and Area

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  1. Circles – Circumference and Area Circumference – the distance around a circle

  2. Circles – Circumference and Area Circumference – the distance around a circle It turns out, if you divide any circle by its diameter you get pi. Pi is a non-repeating, non-terminating decimal. We’ll always use 3.14 as an approximate value when calculating using Pi.

  3. Circles – Circumference and Area Circumference – the distance around a circle It turns out, if you divide any circle by its diameter you get pi. Pi is a non-repeating, non-terminating decimal. We’ll always use 3.14 as an approximate value when calculating using Pi. Example # 1 : The radius of a circle = 4 inches. Find diameter = ? circumference = ?

  4. Circles – Circumference and Area Circumference – the distance around a circle It turns out, if you divide any circle by its diameter you get pi. Pi is a non-repeating, non-terminating decimal. We’ll always use 3.14 as an approximate value when calculating using Pi. Example # 1 : The radius of a circle = 4 inches. Find diameter = 8 inches circumference = ?

  5. Circles – Circumference and Area Circumference – the distance around a circle It turns out, if you divide any circle by its diameter you get pi. Pi is a non-repeating, non-terminating decimal. We’ll always use 3.14 as an approximate value when calculating using Pi. Example # 1 : The radius of a circle = 4 inches. Find diameter = 8 inches circumference = 25.12 inches

  6. Circles – Circumference and Area Circumference – the distance around a circle It turns out, if you divide any circle by its diameter you get pi. Pi is a non-repeating, non-terminating decimal. We’ll always use 3.14 as an approximate value when calculating using Pi. Example # 2 : The circumference of a circle = 47.1 feet. Find diameter = ? radius = ?

  7. Circles – Circumference and Area Circumference – the distance around a circle It turns out, if you divide any circle by its diameter you get pi. Pi is a non-repeating, non-terminating decimal. We’ll always use 3.14 as an approximate value when calculating using Pi. Example # 2 : The circumference of a circle = 47.1 feet. Find diameter = 15 feet radius = ?

  8. Circles – Circumference and Area Circumference – the distance around a circle It turns out, if you divide any circle by its diameter you get pi. Pi is a non-repeating, non-terminating decimal. We’ll always use 3.14 as an approximate value when calculating using Pi. Example # 2 : The circumference of a circle = 47.1 feet. Find diameter = 15 feet radius = 7.5 feet

  9. Circles – Circumference and Area Area of a Circle – the amount of square units inside the circle

  10. Circles – Circumference and Area Area of a Circle – the amount of square units inside the circle

  11. Circles – Circumference and Area Area of a Circle – the amount of square units inside the circle Example 2 : The area of a circle is 78.5 square meters. What is its radius ? Solution :

  12. Circles – Circumference and Area Knowing the circumference of a circle can help us find lengths of arcs in circles and central angle measurements. The total number of degrees in a circle = 360 degrees. We can use proportions to solve these problems.

  13. Circles – Circumference and Area Knowing the circumference of a circle can help us find lengths of arcs in circles and central angle measurements. The total number of degrees in a circle = 360 degrees. We can use proportions to solve these problems. Example : Find arc AC if radius = 4 cm and measure of angle AOC = 30 degrees. 2 A 30° O C

  14. Circles – Circumference and Area Knowing the circumference of a circle can help us find lengths of arcs in circles and central angle measurements. The total number of degrees in a circle = 360 degrees. We can use proportions to solve these problems. Example : Find arc AC if radius = 4 cm and measure of angle AOC = 30 degrees. 2 A 30° O Solution : C

  15. Circles – Circumference and Area Knowing the circumference of a circle can help us find lengths of arcs in circles and central angle measurements. The total number of degrees in a circle = 360 degrees. We can use proportions to solve these problems. Example : Find arc AC if radius = 4 cm and measure of angle AOC = 30 degrees. 4 A 30° O Solution : C

  16. Circles – Circumference and Area Knowing the circumference of a circle can help us find lengths of arcs in circles and central angle measurements. The total number of degrees in a circle = 360 degrees. We can use proportions to solve these problems. A Example : Find circumference if arc AC = 24 inches and measure of angle AOC = 60 degrees. . 24 60° C O

  17. Circles – Circumference and Area Knowing the circumference of a circle can help us find lengths of arcs in circles and central angle measurements. The total number of degrees in a circle = 360 degrees. We can use proportions to solve these problems. A Example : Find circumference if arc AC = 24 inches and measure of angle AOC = 60 degrees. . 24 60° C O Solution :

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