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- If a preimage is rotated 360 degrees about the origin how can you describe its imageFind the perimeter of a regular octagon (eight equal sides with equal interior angles) that is inscribed in a circle of radius 10. All vertices of the octagon touch the circle.Let a triangular region be partitioned into two triangular regions by segment through a vertex. Show the figure by partitioning the triangular region into two triangular regions, then Compare the defect of the original triangle with the defects of the two smaller triangles formed.