Using a Proportion based on similarity, find the length of DE. PLEASE HELP OMG

Arunning track in the shape of an oval is shown. the ends of the track form semicircles. a running track is shown. the left and right edges of the track are identical curves. the top and bottom edges of the track are straight lines. the track has width 56 m and length of one straight edge 130 m. what is the perimeter of the inside of the track? (π = 3.14) 260.00 m 347.92 m 372.00 m 435.84 m

Three times the sum of a number and seven is negative thirty-six. what is the number?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square