900×20.7 using partial products.

What describes horizontal cross section of the right rectangle 6m 8m 5m

(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

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.