For each of the isosceles triangles the ratio of the length of one of hte congruent sides to the length of the base 1.3 tell the length of one side of the cotagon to the nearest 0.1 inch

Also
David says that a regular octagon is composed of eight isosceles triangles, so he suggests that they draw the four lines of symmetry and mark off the triangles. Draw a line to show where to make one of hte cuts. Give the angle measures for the isosceles triangles.