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Section 2.1 Rectangular Coordinates-Relations

# Y x2 x1 x1 y1 d y2 y1 x x2 y2 example 1 find

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Unformatted text preview: | (x1 , y1 ) d |y2 − y1 | x (x2 , y2 ) Example 1 Find the distance between (−1, 3) and (5, 0). 2 Determine if the points P (−2, −1), Q (8, 2), and R (1, −11) are vertices of a right triangle. Outline Relations Graphing Relations Circles Circles Deﬁnition y The set of points (x , y ) that lie a ﬁxed distance r > 0 from a ﬁxed point C (h, k ) is called a circle. r is called the radius and C is called the center of the circle. Example Draw the circle with radius 5 and center C (1, −2). r C (x , y ) x Outline Relations Graphing Relations The Standard Form of the Equation of a Circle If the distance from C (h, k ) to (x , y ) is r , then r= (x − h)2 + (y −...
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