# SOLUTION: The vertices of &#8962;ABC are A(-3,4) B(-1,3), C(3,-2). The triangle is rotated 90 degrees counterclockwise. Use the rotation matrix [0 -1][1 0] (please note that [1 0] is directl

Algebra ->  Algebra  -> Angles -> SOLUTION: The vertices of &#8962;ABC are A(-3,4) B(-1,3), C(3,-2). The triangle is rotated 90 degrees counterclockwise. Use the rotation matrix [0 -1][1 0] (please note that [1 0] is directl      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Geometry: Angles, complementary, supplementary angles Solvers Lessons Answers archive Quiz In Depth

 Question 98366: The vertices of ⌂ABC are A(-3,4) B(-1,3), C(3,-2). The triangle is rotated 90 degrees counterclockwise. Use the rotation matrix [0 -1][1 0] (please note that [1 0] is directly under [0 -1] but I do not have large enough brackets or the know-how to place it like that)to find the coordinates of C'. I hope this made sense. Thank you for helping me. Answer by stanbon(57219)   (Show Source): You can put this solution on YOUR website!C(3,-2). The triangle is rotated 90 degrees counterclockwise. Use the rotation matrix [0 -1][1 0] (please note that [1 0] is directly under [0 -1] but I do not have large enough brackets or the know-how to place it like that)to find the coordinates of C'. ----------- [0..-1] [1...0] times [3] [-2] C' = [2] [3] ------------- You can check this out visually by plotting (3,-2), sketching a circle thru that point with center at the origin, then extimate a counter-clockwise rotation of 90 degrees. Do you end up at (2,-3)? ----------------- cheers, Stan H.