Question

5. A triangle with a perimeter of

8 is dilated by a scale factor
of 2. What is the perimeter
of the new triangle?

Answer 1

Explanation:

a scale factor normally applies to lengths (one-dimensional sizes).

the perimeter of a triangle is calculated only by using lengths, so we can apply the scaling factor directly to the perimeter.

perimeter of the new triangle = 2 × perimeter of the old triangle = 2×8 = 16