Mathematics
Grade9
Easy

Question

The ratio of perimeter similar to triangles is equal to

  1. Scale factor
  2. Square of corresponding sides
  3. Ratio of corresponding angles
  4. Equal to the length of sides

hintHint:

if two triangles are similar, then their corresponding angles are congruent and corresponding sides are in equal proportion (= scale factor) .

The correct answer is: Scale factor


    The side lengths of second second triangle can be written as scale factor x (corresponding side lengths of first triangle).
    Adding summation on both side gives perimeter of second triangle = scale factor x (perimeter of first triangle)
    Therefore, Ratio of the perimeter of similar triangles is equal to the scale factor.

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