Question

the perimeter of δabc is 13 cm. it was dilated to create δabc. what is the perimeter of δabc? 13 cm 26 cm 39 cm 52 cm

Explanation:

Step1: Find the scale factor

Scale factor $k = \frac{OB'}{OB} = \frac{5+15}{5} = 4$

Step2: Calculate new perimeter

New perimeter = $13 \times 4 = 52$ cm

Answer:

D. 52 cm