Circles in Coordinate Plane 12 5 day 5

Circles in Coordinate Plane (12. 5) (day 5) http: //www. youtube. cgvom/watch? v=OJKa. NO 7 DD 90 SWBAT write an equation of a circle (G. 12) Warm-Up: Power Point slide (1 -13) **hw/hw log/Storybook/graph paper/workbook p. 327 Put Storybook in bucket A Homework (day 5): p. 800 (2, 3, 5, 6, 7, 8, 15, 18, 20, 22, 26, 28, 32, 35, 38, 41, 42)- ck odd answers in text Pearsonsucces due Friday

Copy into your SOL binder (day 5) Answer: Center (0, 2) (-5, 2) or (0, 7) or (5, 2) or (0, -3)

Copy this into SOL binder (day 5) Answer: C

Copy this into SOL binder (day 5) Answer: (x+3)2 + (y+1)2 = 25

Copy into your SOL Binder (G. 12)- day 5 A circle has a center at (-1, 4) and a diameter of 20. Select each pair of coordinates that represent a point on this circle. (-7, -4) (11, 20) (19, 16) (5, 12) (-9, -2) (-1, 4) (-7, -4) (5, 12) (-9, -2)

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Write the equation of the circle. is a diameter of the circle where A(-3, 2) and B(5, 4). Write the equation of the circle. Now, graph the circle (be precise)! Center = Midpt of the diameter ∴ use the midpt formula (1, 3) Radius is the distance from the center to a point on the circle. ∴ use the distance formula

Write an equation: Center (2, -3) and radius is 5. Graph the circle. (be precise)!

Write the equation of the circle. (x – 2)2 + (y +1)2 = (√ 8)2

Given: (x + 5)2 + (y – 2)2 = 64 Center (-5, 2) Radius 8 Which points lie on the circle? (-5, 10) (0, -2) (-5, -8) (0 , 9) (-15, -5) (3, 2)

Given: (x + 2)2 + (y – 3)2 = 16 1. 2. 3. 4. Identify the center Find the radius Plot on point on the circle Now, connect Points…. is it a circle? Ellipse?

Classwork

Classwork

Let’s Practice: Workbook p. 327 (3, 4, 10, 14, 15 - be careful of the scale, 20, 24, 28, 29)