TASK #3.1

Congratulations!

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You discovered Pi yesterday.  If each object was measured with 100% accuracy, the ratios of circumference to diameter would have all been exactly the same.

Pi is a weird number because its decimals go on forever without ever repeating. Screen Shot 2020-04-15 at 7.38.27 AMThere are computers working around the clock to try and find an end to it.  Check this out:

When using pi in class work we can get away with using 3.14.  But when you graduate to building spaceships, where being off by a hair in a measurement can cause a shuttle to burn up on re-entry, the accuracy of keeping all of the decimals in pi can save lives.

There is pi button on your calculator, it will help you in your calculations.  Find it now!

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Study the videos and pictures below:

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Task #1:

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Take note:

Area is the amount of space there is on a flat surface.  The size of a house (square feet), a piece of land (acres), wrapping a present (how much paper do you use?); These are all times when we need to calculate area.

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When we calculate areas of shapes with straight lines, we can use formulas that will help us score the answer efficiently:

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Task #2

When we are looking to find the area of a curved surface it gets a little tricky.  Use the gridlines to estimate the circles below, try a find a relationship between 3.14, radius and the area of a circle.

 

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BIG DEAL HERE:

Look at your estimates of the area and try and find how the radius and 3.14 (∏) could be factors in this equation.

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