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Reaper534
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@Mertsj

Mertsj
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Let's get rid of the one triangle that we don't need for this one.

Mertsj
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dw:1359241647844:dw

Mertsj
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Can you solve that equation for x?

Reaper534
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i divide 18 by 2 and get 9 then ill get 9sqrt2

Mertsj
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\[x \sqrt{2}=18\]

Mertsj
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Divide both sides by sqrt 2

Reaper534
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18sqrt2/sqrt 4

Mertsj
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\[\frac{x \sqrt{2}}{\sqrt{2}}=\frac{18}{\sqrt{2}}\]

Mertsj
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\[x=\frac{18}{\sqrt{2}}\]

Mertsj
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Now simplify. Multiply numerator and denominator by sqrt2

Reaper534
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i get 18sqrt2/sqrt4 and then i get sqrt18/4

Mertsj
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\[\frac{18}{\sqrt{2}}\times \frac{\sqrt{2}}{\sqrt{2}}=\frac{18\sqrt{2}}{2}=9\sqrt{2}\]

Reaper534
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ohh if a sqrt in on numerator and a other on denominater i can cancell each other

Mertsj
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no.