Which figure has all sides of equal measure but not necessarily all angles of equal measure?

Which term best describes the association between variables a and b

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c