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Square and Circle Area

Directions: Find the largest combined area for the rectangle and circle by filling the boxes with numbers 1 through 6. You may use a digit at most once.



Which numbers would yield a greater area?
Which numbers would yield the greatest area for just the rectangle?
Which number would yield the greatest area for the just the circle?
How can you combine these to find the greatest combined area?



The largest area is found by having a circle with radius of 4 and the dimensions of the rectangle are 6 by 53. Total area is about 368.24 square units.

Source: Mike Chamberlain

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  1. I was experimenting and found the lowest number possible. With a radius of 3, and base of 24, and a height of 1, I ended up with a 52.27433388.

  2. Should this be titled “Rectangle and Circle Area” instead? Some of my students were mislead and thought the rectangle had to be a square.

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