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Homework 12A2 • Read section 12-2. • Define: TANGENT. • Copy the 3 Yellow boxes on pages 593, 595, & 596 into your “Notes” book. • Finish Mixed Exercises 12-1 Drill 12A2 1. Which equation should be used to solve for x? a. 360 - (9x- 10)=90 b. 4x +10= 5x -20 x0 c. 4x +10= 5x +70 (3x+10)0 (5x-20)0 Drill 12A2 2. The shaded figure is the image of the non-shaded figure. State whether the mapping is a reflection, rotation, translation, glide reflection, or dilation. Homework 12A2 • Read section 12-2. • Define: TANGENT. • Copy the 3 Yellow boxes on pages 593, 595, & 596 into your “Notes” book. • Finish Mixed Exercises 12-1 Drill 12A2 1. Which equation should be used to solve for x? a. 360 - (9x- 10)=90 b. 4x +10= 5x -20 x0 c. 4x +10= 5x +70 (3x+10)0 (5x-20)0 Drill 12A2 2. The shaded figure is the image of the non-shaded figure. State whether the mapping is a reflection, rotation, translation, glide reflection, or dilation. Circles Objective: The student will write and use the equations of a circle. Graph the equation It’s a x 2+y2=25. CIRCLE! ( 5, 0) ( 4,-3) ( 0, 5) ( 3,-4) There are more (-5, 0)(-3,-4) But it’s NOT. coordinates. ( 0,-5) (-4,-3) At this point ( 3, 4) (-4, 3) it 3) (-3, 4) ( 4,looks like a square. Graph the equation x 2+y2=16. What happened to the circle’s radius? How did the number after the = affect the radius of the circle? Graph the equation x 2+y2=9. What happened to the circle’s radius? How did the number after the = affect the radius of the circle? Graph the equation x 2+y2=4. What happened to the circle’s radius? How did the number after the = affect the radius of the circle? Graph the equation (x+2) 2+y2=25. What happened to the circle’s center? How did the number in parentheses affect the center of the circle? Graph the equation (x-2) 2+y2=25. What happened to the circle’s center? How did the number in parentheses affect the center of the circle? Graph the equation x 2+(y+2)2=25. What happened to the circle’s center? How did the number in parentheses affect the center of the circle? Graph the equation x 2+(y-2)2=25. What happened to the circle’s center? How did the number in parentheses affect the center of the circle? Graph the equation (x+3) 2+(y-2)2=25. What happened to the circle’s center? How did the number in parentheses affect the center of the circle? Graph the equation (x-1) 2+(y+2)2=25. What happened to the circle’s center? How did the number in parentheses affect the center of the circle? Write the equation of the Circle The center is at (1,0), and the radius = 5, so the equation is (x-1)2+(y-0)2=25 or (x-1)2+(y)2=25 Write the equation of the Circle The center is at (2,1), and the radius = 5, so the equation is (x-2) 2+(y-1)2=25 Write the equation of the Circle The center is at (1,2), and the radius = 4, so the equation is (x-1) 2+(y-2)2=16 Write the equation of the Circle The center is at (-1,-2), and the radius = 4, so the equation is (x+1) 2+(y+2)2=16 Write the equation of the Circle The center is at (3,-2), and the radius = 3, so the equation is (x-3) 2+(y+2)2=9 Please work the Mixed Exercises problems on worksheet 12-1 of your packet. Now Pass in your closer answers. Pack up and be ready to leave when the tone sounds. DO NOT LEAVE YOUR SEAT UNTIL THE TONE!

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posted: | 7/28/2012 |

language: | English |

pages: | 25 |

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