Question

1. a triangle with sides measuring 9 centimeters, 21 centimeters, 15 centimeters and dilated by a scale factor of $\frac{1}{3}$

Explanation:

Step1: Multiply side 1 by scale factor

$9\times\frac{1}{3}=3$

Step2: Multiply side 2 by scale factor

$21\times\frac{1}{3}=7$

Step3: Multiply side 3 by scale factor

$15\times\frac{1}{3}=5$

Answer:

The new side - lengths are 3 centimeters, 7 centimeters, and 5 centimeters.