00:01
Hello, hi students, let me explain you the question here.
00:03
This is the figure they have given.
00:05
So here, ef, a, g or striped lines.
00:09
So this ef as well as ag, these are straight lines.
00:14
So the striped lines, ad, so this is the striped lines, ad, and b, c, they are parallel.
00:23
So the a .d as well as b, c, these two lines.
00:28
So these two lines, they are parallel.
00:30
Okay these two lines are parallel so angle hab so angle hab it is the 79 degrees whereas ab hb angle it is the 45 degree the angle marked theta are equal so the angle marked theta are equal so here we have to explain why the two angles marked theta are equal we have to explain why theta are equal and find the value of theta and we have to find the c b z angle also so coming to the explanation so here what they have given ad it is parallel to bc so angle h kb is equal to 79 and angle a b h is equal to 45 degrees this is the value given so here ad is parallel to b c and the ef so this e of it works as a transversal okay so e of it works as a transfer so what happens here the angle e hd and angle hb seam so these two angles are corresponding angles so whenever the two lines are parallel if a transfer cell intersects these two parallel lines then the corresponding angles are equal so these two are so the theta or corresponding angles so the corresponding angles are equal so the this theta are equal, theta are equal.
02:08
So in triangle ab, h.
02:11
So angle h .a .b.
02:15
Angle h .a .b...