219264_Topic 2a_2017.pptx

# B perpendicular to the line y 3 containing the point

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b) Perpendicular to the line y = – 3; containing the point (–3, 4). 1. Find the slope and y-intercept of each line. Graph the line. a) b) 1 2 4 y x 4 6 x y

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2.4: Circles 11 A circle is a set of points in the xy -plane that are equidistant from a fixed point, called the center . The fixed distance from the circle’s center to any point on the circle is called the radius . The standard form of an equation of a circle with radius r and center ( h , k ): If the center is at the origin (0,0) If the radius is 1, ( r = 1) (unit circle) The general form of the equation of a circle is: 2 2 2 ) ( ) ( r k y h x 2 2 2 r y x 1 2 2 y x 0 2 2 c by ax y x
12 1. Determine the centre and radius of each of the following circles and sketch the graph of the circle. a) b) c) Example: Solution a) b) c)
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