Mike used a a coordinate plane to design the patio shown on the right D(7,7 E (9,7) B (3,4) C (7,4) A (3,2) F(9,2) each unit on the grid represents one yard to buy materials to build the patio Mike needs to know its perimeter what is the perimeter of the patio

  180 ft

Step-by-step explanation:

The perimeter of a geometric figure is the sum of the lengths of its sides. Opposite sides of a rectangle are of equal length, so the perimeter can be figured as twice the sum of the length of adjacent sides:

  2(60 ft + 30 ft) = 180 ft

Mrs. Chen needs 180 feet of fence.