Aim 70 ­ Circumference
Aim 70: The Circumference of a Circle
DO NOW: Define the following and label on each circle.
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Aim 70 ­ Circumference
Aim 70: The Circumference of a Circle
Circumference of a Circle
Complete the following chart using the information from the class circle activity:
Diameter
Circumference
Relationship between diameter and circumference
• Describe any relationship you see between the circle’s diameter and circumference.
• If you know a circle’s diameter, how can you predict its circumference?
• If you know a circle’s radius, how can you predict its circumference?
• If you know a circle’s circumference, how can you predict its diameter or radius?
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Aim 70 ­ Circumference
Circumference formulas: Practice: Find the circumference of a circle when:
1. The radius is 4 to the nearest tenth.
2. The diameter is 14 in terms of π. 3. The radius is 6 in terms of π. 4. The diameter is 18 to the nearest hundredth. 3
Aim 70 ­ Circumference
5. Find the circumference of this circle in terms of π. 6. Find the circumference of this circle in terms of π
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Aim 70 ­ Circumference
7. A circle has a circumference of 8π. Find the diameter of the circle. 8. A circle has a circumference of 26π. Find the radius of the circle. 5
Aim 70 ­ Circumference
9. A circle has a circumference of 17π. Find the diameter of the circle. 10. A circle has a circumference of 15π. Find the radius of the circle. 6
Aim 70 ­ Circumference
Aim 70
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Aim 70 ­ Circumference
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Aim 70 ­ Circumference
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Attachments
Aim 70 ­ Circumference.docx