Decompose the regular octagon into a rectangle and two trapezoids. what is the area of the? octagon? a regular octagon has sides of length 4 meters. a line 4.83 meters long joins the center of the octagon to its leftmost side at a right angle. a horizontal dashed line joins the top of the leftmost side and the top of the rightmost side. a dashed line 2.83 meters long joins the top right vertex to the first dashed line at a right angle. 4.83 m 4 m 2.83 m the area of the regular? octagon, found by decomposing the octagon into a rectangle and two? trapezoids, is