Respuesta :

darklynx666

Answer:

The answer is 10.6 (I'm sorry if it's wrong)

Step-by-step explanation:

found out what D and B is (they both are 4 I think) then add 10 with 8 then divide 120 with 18 which is 6.6 then add what D is and then I got 10.6

noelyen1216

Answer:

18

Step-by-step explanation:

draw the trapezoid and split it into two 30 60 90 triangles and one rectangle. the width of the rectangle is 10, and the base of the triangles is 4, using cosine. 10 + 4 + 4 = 18