Module 20- The Cirlce
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the standard form equation for graphing a circle? | (x-h)²+(y-k)²=r²
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| Define radius. | The distance from the center of the circle to any point of the circle.
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| What is the difference between a parabola and a circle? | Circles have an x² and a y². Parabolas have EITHER an x² or a y².. Not both.
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| What point is represented at (h,k)? | The center of the circle.
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| What point is represented at (x,y)? | Any point on the circle.
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| What is the center of the circle given this equation? x²+y²=4 | (0,0)
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| How would you graph a circle with a center of (3,4) and a radius of 2? | Plot the center at x=3, y=4. Then plot the points in each direction moving 2 units out. Up (3,6) Down (3,2) Left (1,4) Right (5,4) and then connect the points using a curved line.
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| What is the equation of a line given the center (4,4) and the radius 5? | (x-4)²+(y-4)²=5²
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| What is the equation of a line given the center (-3,4) and the radius 2? | (x+3)²+(y-4)²=2²
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| In the graph of the equation (x-3)²+(y-2)²=5, what is the distance between the center of the circle at any point on the circle? WHY? | â5 because the formula (x-h)²+(y-k)²=r² so we take the â of 5.
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| What is the center of this circle? (x-3)²+(y+1)²=25 | (3,-1)
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| What is the radius of this circle? (x-3)²+(y+1)²=25 | r=5 (square root of r²=25 is your answer)
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
bmuonio
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