Answer:
what? if u mean by rounding, its 103
It is given in the question that
BD is the median. So it divides the opposite sides in two equal parts .
Therefore in triangles BAD and BCD,
AB and AC are congruent because of isosceles triangle.
AD and CD are congruent because of the median BD.
And BD and BD are congruent .
So the two triangles are congruent by SSS and the correct option is the first option .
The value of cos B is 12/13
the value is
1.2r-11.3r=40
-10.Ir=40
r=40/-10.1
r=-0.2525
hope this helps :):):)
Answer: 83%
Explanation: idk how to explain but there ya go
