Rotating, Resizing, Duplicating and Deleting Shapes in Microsoft Visio
Clean Rotating Shapes by bbpixel
Rotations about a Point: Geometry - Math Lessons
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geometry - Rotate triangle ABC around the origin - Mathematics Stack Exchange
Find the centre of rotation?
3 Ways to Rotate a Shape - Lindsay Bowden
Text rotation in shapes inside xls and xlsx files FlexCel Studio for the .NET Framework documentation
Rotating shapes worksheets
Rotation - KS3 Maths - BBC Bitesize
Rotating and Flipping Lines and Shapes - Microsoft® OneNote® 2010
Rotations of Shapes