Question

Triangle DEF has coordinates D(1,1). E(1,5), and F(5.1). Triangle D'EF is the image of ADEF by a dilation with center (0.0) and a scale factor of
7. What is DF?

Answer 1

Answer:

$2282 \div 2 = < \leqslant 2 \times \frac{?}{?} {?}^{?} \sqrt{226 \tan( \cot(?) ) }$