roseymuffin0510 roseymuffin0510 14-05-2024 Mathematics Answered 13. In trapezoid CDEF, angle D = angle E = 90°, angle C = 60°, EF = 4.5 cm, and DE = 3.5 cm. What is the perimeter of the trapezoid to the nearest millimetre? Describe your strategy. the answer given in my textbook was 186 mm