ADEF is a dilation image of AABC. What is the scale factor?

We just started the introduction into circles and i have no idea how to do this.

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?

First work with stencil one. use a combination of reflections, rotations, and translations to see whether stencil one will overlap with the original pattern. list the sequence of rigid transformations you used in your attempt, noting the type of transformation, the direction, the coordinates, and the displacement in