In the diagram, point O is the center of the circle and AC and BD intersect at point E. My sister had this same question
She used the methods REASON AND EXPERIENCE.
It is used in the visual arts to describe a human figure standing with most of its weight on one foot so that its shoulders and arms twist off-axis from the hips and legs. This gives the figure a more dynamic, or alternatively relaxed appearance. It can also be used to refer to multiple figures which are in counter-pose (or opposite pose) to one another. It can further encompass the tension as a figure changes from resting on a given leg to walking or running upon it
The President is the Commander in Chief of the armed forces