The required scale factor of ABC to DEF is 1/3.
Scale factor of ABC to DEF to determine.
What is scale factor?
The scale factor is defined as the ratio of modified change in length to
Here, Triangle ABC is similar to triangle DEF. So, the ratio of the same sides describe the scale factor.
Scale factor = EF/BC
= 7/21
= 1/3
Thus, the required scale factor of ABC to DEF is 1/3.
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