Q : 10 In and , and . Vertices A, B and C are joined to vertices D, E and F respectively (see Fig. ). Show that
(i) quadrilateral ABED is a parallelogram
Given : In and , and .
To prove : quadrilateral ABED is a parallelogram
Proof : In ABED,
AB=DE (Given)
AB||DE (Given )
Hence, quadrilateral ABED is a parallelogram.