2 votes

In a triangle ABC rectangle in C, the side AC = 30 and hc = CD = 24.

We are asked to calculate the value of the length of the semicircle CBD.

2voto

Anon User Points 0
;) White Hello! The situation is as follows:! [] (/ / blob.todoexpertos.com/uploads/md/fed47f4c4a384df29b62eb2f0bf374ea.png) height theorem: '
$$ \begin{align}&CD^2=AD· DB\\ & \ & 24 ^ 2 = 18· DB\\ & \ & DB = \frac {24 ^ 2} {18} = 32\\ & \ & pitagoras:\\&cb^2=cd^2+db^2\\&\\&cb=\sqrt {24 ^ 2 + 32 ^ 2} = \sqrt {1600} = 40\\ & \ & r = 20\\ & \ & logitud_ {semicircle} = \pi r = 20 \pi=62,8318··· \end{align}$$'Saludos

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