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Question of the day

Question of the day. Name one two shapes that are always similar. dilations. Are the increase or decrease of a shape at a certain scale They are always similar Meaning same shape but different size. Two things we do. We create a dilation using scale factor

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Question of the day

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  1. Question of the day Name one two shapes that are always similar.

  2. dilations • Are the increase or decrease of a shape at a certain scale • They are always similar • Meaning same shape but different size

  3. Two things we do • We create a dilation using scale factor • Find scale factor by comparing two dialations

  4. Create dilation • First plot points given • Then multiply each coordinate by the scale factor given

  5. example • Scale factor 3 • A(1,2) B(2,4) C(3,4) • A’(1*3, 2*3) B(2*3, 4*3) C(3*3, 4*3) • Dilated shape is • A(3,6) B(6,12) C(9,12)

  6. How to find scale factor • divide two shape’s coordinates • D(1,2) E(2,3) F(4,5) • D’(3,6) E’(6,9) F’(12,15) • Divide each corresponding coordinate and get 3 • Scale factor is 3

  7. foldable • On front cover write foldable • Inside bottom glue graph paper and plot these three points • A(1,3) B(2,4) C(3,2) • On top flap • Write the points

  8. Turn to next page • On bottom cover glue graph paper • Plot same three point, connect them • On top write three points • Then figure three new dilated points using scale factor 2 • Plot those new points and connect them

  9. On last flap • Bottom flap glue graph paper • Plot these six points • D(-1,2) E(0,0) F(2,1) • D’(-2,4) E’(0,0) F’(4,2) • On top flap divide corresponding coordinates to find the scale factor

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