Asked by Jenny
Given: Circle k (O), O ∈ AB
CD altitude to AB
Prove: AD·CB = AC·CD
CD altitude to AB
Prove: AD·CB = AC·CD
Answers
Answered by
oobleck
rewrite the equation as
AD/CD = AC/BC
Since the two small triangles are similar, this must be true.
AD/CD = AC/BC
Since the two small triangles are similar, this must be true.
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