Lines b and care parallel. What is the measure of 26?
a
m26 = 45°
b
m26 = 54°
(13x+9)° 2
3/4
5/6
(5x+9°/8
m26 = 117°
с
m26 = 126

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.