Three forces with magnitudes of 105 lbs, 120 lbs. and 92 lbs. act on an object at angles of 55°, 120° and -65° respectively. Find the component form of resultant vector and then find the
magnitude and direction angle of the resultant vector. Please show all your work.

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.