High School · Similarity, Right Triangles, and Trigonometry

CCSS.MATH.CONTENT.HSG.SRT.A.1a

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.

Read this standard on the official Common Core site

Lessons that teach this standard

• Properties of Dilations: Parallel Lines and Scaled Lengths

  How to dilate from any center, why a dilation sends a line to a parallel line and leaves lines through the center in place, and why every length scales by k.