Using Student Responders To respond to a question: • Wait for polling to open. • Select your response • You do not have to turn on your responder, it is ready to go.
Crop circle image 1 Insert image of a crop circle design. Example: http://science.howstuffworks.com/science-vs-myth/unexplained-phenomena/crop-circle.htm
Example crop circles can be foundathttp://www.stonehenge-stone-circle.co.uk/crop-circles.htm
Crop circle example can be found at http://www.ufo-reports.com/crop-circles.html
Why Circles? • They are cool to look at. • Farmers are able to plant more crops. • Crops grow better in circle plots. • Crops are watered more efficiently.
Why Use Center Pivot Systems? PROS (advantages) CONS (disadvantages)
Why So Close? • Farmers want to make the most of limited space. • We have plenty of land • It is easier for farmers. • It is easier to construct the irrigation system
What is Area? • The distance around a shape. • The amount of 2-D space inside a boundary. • The amount of 3-D dimensional space an object occupies. • The sum of the sides of a shape.
An Area Answer Tells Us . . . • How many square units are in a 2-D space. • How many cubic units are in a 3-D space. • How many units are in a line.
Area fill-in1 1 square = 1 square meter
Area fill-in1 AREA: AREA: AREA:
Area of a Parallelogram? • Base●Height • Side+Side+Side+Side • Length÷Width • ½ (Base●Height)
Formula chart Base •Height bh
Area of a Triangle? • base•height • base•height • 2•base•height • base•height
Formula chart ½Base • Height (½ bh)
Area of a Circle?5 RED: Half the circumference =Length ORANGE:Radius = Width
Area of a Circle? • • r • r= r2 • 2r • r • 2r • r = 2r2
ORANGE: Radius = Width RED: Half the circumference =Length
Percent of Farm NOT Used Farm Area 2.70 km2 Farm NOT Used .91 km2
33.7% Farm Not Used Farm NOT Used .91 km2 Farm Area 2.70 km2 .337 ● 100= .91÷ 2.70= 33.7%