In a triangle the second angle measures twice the first and the third angle measures five more than the second of the sum of the angle measures is 180 find the measure of each angle

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

How can i differentiate this equation?

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.