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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
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