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Objective: Find the circumference and area of circles

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Circle – Label The parts Radius Diameter

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

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

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

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Area of a Circle AreaArea of a circle is the amount of space the circle covers.

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

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

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

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

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

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Instructional Conversation Problem #2 Find the circumference. 4

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

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Instructional Conversation Problem #4 Find the area. 20

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Circles Shape and Space. The value of π For any circle the circumference is always just over three times bigger than the radius. The exact number is called.

Circles Shape and Space. The value of π For any circle the circumference is always just over three times bigger than the radius. The exact number is called.

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