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What types of symmetry does this regular octagon

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What type(s) of symmetry does this regular octagon possess? If it has line symmetry, identify how many lines of symmetry it has and sketch them. If it has rotational symmetry, identify the angle of rotation. (Remember to consider point symmetry as well.) Z Y X W V U T S R Q A

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8.) A diameter of a circle has endpoints at 9 ,9 2 - ÷ and 10 11 , 3 2 ÷ . What are the coordinates of the center? 9.) Given that P = (2 c , -2 d ) and Q = (3 d , 4 c ), if the midpoint of PQ is (3, -10), what are the values of c and d ? 10.) If the midpoint of a segment is at (5, -1) and one of its endpoints is at (-1, 7), what are the coordinates of the other endpoint? 11.) Given that the slope of the line thru ( 29 2 5, x and ( 29 3, 2 x - - is 1, what value(s) could x have? 12.) Are each of the following pairs of points collinear or noncollinear? Show all work: a.) (-2, 6), (4, 10), and (10, 14). b.) (2, 5), (4, 7), and (6, 10).
13.) Use the diagram at right to answer each of the following questions: a.) What is the slope of NO ? Of NP ? Of PO ? b.) If point R is the midpoint of , NO what are its coordinates? c.) What is the slope of median ? PR e.) If OK is the altitude of NOP V from vertex O to side NP , what is its slope?

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