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G-SRT.A. Understand similarity in terms of similarity transformations

    G-SRT.A.1. Verify experimentally the properties of dilations given by a center and a scale factor:

      G-SRT.A.1.a. A dilation takes a line not passing through the center of the dilation to a parallel line, and leaves a line passing through the center unchanged.

      G-SRT.A.1.b. The dilation of a line segment is longer or shorter in the ratio given by the scale factor.

    G-SRT.A.3. Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.