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Dilations and Similarity in the Coordinate Plane

Dilations and Similarity in the Coordinate Plane . 7.6 Video By: Math with M.E.R. Vocab:. Dilation: a transformation that changes the size of a figure but not it’s shape. The pre image and the image are always the same. Scale Factor: Describes how much the figure is enlarged or reduced.

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Dilations and Similarity in the Coordinate Plane

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  1. Dilations and Similarity in the Coordinate Plane 7.6 Video By: Math with M.E.R

  2. Vocab: • Dilation: a transformation that changes the size of a figure but not it’s shape. The pre image and the image are always the same. • Scale Factor: Describes how much the figure is enlarged or reduced.

  3. Dilation Show the dilation with scale factor of 2: M (0,0) E (2,4) R (3,0)

  4. Finding Coordinates of Similar Triangles Find the coordinates of S and the scale factor. M(0,8) E(0,4) L R(6,0) S

  5. Proving Triangles are Similar Given: A(0,0) B (-1,1) C(3,2) D(-2,2) E (6,4) Prove: ∆ABC similar to ∆ADE

  6. Proving that Triangles are Similar by SSS Similarity. • In order the prove that they are similar by SSS similarity you find the distance between all the sides in both the original triangle and of the dilated triangle. Then use the similarity ratios that were shown in the previous example.

  7. Thanks for watching! #mathwithMER

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