Mathematics

Grade9

Easy

Question

# The ratio of perimeter similar to triangles is equal to

- Scale factor
- Square of corresponding sides
- Ratio of corresponding angles
- Equal to the length of sides

Hint:

### 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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