If abc fmu, what is the length of mu ?

(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

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Which statements are true about additional information for proving that the triangles are congruent check all that apply