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Composition 2

A composition is a series of steps that leads to a final figure. In this composition there was a reflection about the point G, followed by a reflection about the y-axis and lastly a 180 degree rotation. I know that the reflection about point G was a reflection because every point of the figure is equidistant from the point of reflection. I know that the reflection about the y-axis is true because the line of reflection forms a 90 degree angle with any segment connecting any point on the pre-image with the image. Lastly, I know that the rotation of 180 degrees happened because each vertex is the same degree and same direction around the center of rotation (H)