which equation can be used to find the measure of a central angle, c, of a regular decagon (a 10-sided polygon) formed by the diagonals of the decagon?

(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

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

How can constraints be used to model a real-world situation?