00:01
Hello everyone, so here we have given a parallelogram.
00:10
So here having the diagonal and this line, marking the points f, e, and a parallel named a, b, b and d.
00:30
So now, taking two triangles, naming triangle a -d -b and triangle b -d -c, so here we have given that e is a point on dc.
00:59
Also, this ae line intersects bd.
01:09
So now, in triangle adp and bdc, it's a parallelogram so sides which are opposite are equal.
01:21
Similarly, bd is equal to bd, common.
01:28
Ab is equal to cd therefore triangle at b is similar to triangle b d c so similarly we can prove triangle a d b similar to triangle a d therefore a f over e f is equal to bf over d f is equal to bf over d hence bf into ef is equal to af into d.
02:13
Hence proved.
02:20
So for the second question, we have triangle a, c, d where it is given that angle e, b, c is congruent to angle a, d, c...