Question

Find missing side lengths

Answer 1

Answer:

$y=30\sqrt{2}$

Step-by-step explanation:

$In$Δ$ABC$

$tan45=AB/BC$

$1=30/BC$            $[tan45=1]$

$-------\\BC=30 \\-------$     ⇒   $OC=30$

$and$ $In$ Δ$ABC$

$Cos45=Bc/AC$  

$1/\sqrt{2} =x/y$

$y=\sqrt{2}*x$

$y=30\sqrt{2}$

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