00:01
In this question, they've given that ao is the radius, which is essentially 12, and so is od, which is also 12.
00:19
And ae is given to be 20.
00:23
And therefore, we can say that oe is nothing but 20 minus 12, which is equal to 8.
00:30
Now, what we are trying to find out is the angle, angle aed needs to be found out.
00:41
So this is the main objective of this question.
00:43
So what we'll do is we'll first of all find that ae multiplied by eb should be equal to ce multiplied by ed.
01:03
So in triangle oed, we have angle oed equals to oe squared plus ed squared minus od squared divided by 2 into oe into ed.
01:27
So that's coming from the theorem.
01:28
That's the cosine angle theorem.
01:33
So this would be 8 squared and ed is given to be 5 and od is given to be, od is something that we found out, which is 12 squared multiplied, divided by 2 into 8 into 5...