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Question
In the diagram to the right, if arc ABC is a semicircle, what is the length of AC?
1. DC = 25/4
2. AD = 4
While proving the similarity of the two triangles , BD is shown as 5 in the solution . I do not understand how is BD 5 ,when nothing as such is stated in the Qn .Or if it is derived from the data , how do I get it?
I have undertood the solution part ,except for how is BD = 5.
THe below image is from the solution part ,where he states BD = 5
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