UPJOKE
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Concave Jokes

The government just built an underground prison. They call it Concave.

It's full of convex.

My friend betrayed me on the test when I asked him where the light rays parallel to the principle axis of a concave mirror meet

I mean, he did try to motivate me by shouting "Focus! Focus!", but that hardly helps.

Where did they put criminal geometrists?

The concave.

Where did fraudulent stone age people conduct business?

The concave.

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