An angle bisector ac divides a trapezoid abcd into two similar triangles ? abc and ? acd. find the perimeter of this trapezoid if the leg ab=9 cm and the leg cd=12 cm.
Abigail made a quilt that has an area of 4800 square inches. the length of the quilt is 1 1/3 times the width of the quilt. what are the dimensions of the quilt