Objective: Find the circumference and area of circles - PowerPoint PPT Presentation

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Objective: Find the circumference and area of circles

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  1. Circles Objective: Find the circumference and area of circles

  2. Circle – Label The parts Diameter Radius

  3. Circumference: C=2 r • Circumference is the length of the distance AROUND the circle • Take 2 times the radius and pi

  4. Find the circumference of a circle with radius 5. Find the circumference of a circle with diameter 10. Circumference: C=2∏r 5 in. 10 in.

  5. Find the circumference of a circle with radius 2. Find the circumference of a circle with diameter 8. Circumference

  6. Area of a Circle • Areaof a circle is the amount of space the circle covers.

  7. Area of a Circle • Find the area of a circle with radius 9. 9 feet

  8. Find the area of the circles below. 1) 2) 6 in. 16 m

  9. Area of a Circle • Find the area of a circle with radius 5.

  10. Area of a Circle • Find the area of a circle with diameter 24.

  11. Instructional Conversation Problem #1 What is the formula for circumference?

  12. Instructional Conversation Problem #2 • Find the circumference. 4

  13. Instructional Conversation Problem #3 What is the formula for area of a circle?

  14. Instructional Conversation Problem #4 • Find the area. 20