The diameter of a circle was

Question

15
15 cm and the diameter of the final circle was
105
105 cm. What is the scale factor?

Answer 1

The scale factor can be determined by comparing the diameters of the two circles.

Given:

• Diameter of the original circle = 15 cm
• Diameter of the final circle = 105 cm

The scale factor is calculated as follows:

\[ \text{Scale factor} = \frac{\text{Diameter of final circle}}{\text{Diameter of original circle}} = \frac{105 \text{ cm}}{15 \text{ cm}} = 7 \]

Thus, the scale factor is 7.