Decide whether the circumference of the circle or the area of the circle is most useful for finding a solution.
1a. A car's wheels spin at 1000 revolutions per minute. The diameter of wheels is 23 inches. You want to know how fast the car is travelling.
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Decide whether the circumference of the circle or the area of the circle is most useful for finding a solution.
1b. A circular kitchen table has a diameter of 60 inches. You want to know how much fabric is needed to cover the table top.
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Decide whether the circumference of the circle or the area of the circle is most useful for finding a solution.
1c. A circular puzzle is 20 inches in diameter. All of the pieces are about the same size. You want to know about how many pieces there are in the puzzle.
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Decide whether the circumference of the circle or the area of the circle is most useful for finding a solution.
1d. You want to know about how long it takes to walk around a circular pond.
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2. The city of Paris, France is completely contained within an almost circular road that goes round the edge. Use the map with its scale to:
a) Estimate the circumference of Paris.
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2. The city of Paris, France is completely contained within an almost circular road that goes round the edge. Use the map with its scale to:
a) Estimate the area of Paris.
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3. Here is a diagram of a softball field.
a) About how long is the fence around the field?
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3. Here is a diagram of a softball field.
b) About how big is the outfield?
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4. Both students agree that they can solve the equation 5k=1,750 to find the constant of proportionality.
* Priya says, "I can solve this equation by dividing 1,750 by 5."
*Kiran says, "I can solve this equation by multiplying 1,750 by 1/5."
a)What value of k would each student get using their own method?
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4b. How are Priya and Kiran's approaches related?
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4c. Explain how each student might approach solving the equation:
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EXIT TICKET
A circular lawn has a row of bricks around the edge. The diameter of the lawn is about 40 feet.
1. Which is the best estimate for the amount of grass in the lawn?
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EXIT TICKET
A circular lawn has a row of bricks around the edge. The diameter of the lawn is about 40 feet.
2. Which is the best estimate for the total length of the bricks?
