• fishos@kbin.social
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      1 year ago

      A triangle with 90° angles, yes.

      But not a four sided TRIANGLE. That itself is a contradiction.

      • TheDankHold@kbin.social
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        1 year ago

        One of the angles is 180 though so imagine what the two sides joined there would look like. After all this isn’t to scale.

        • fishos@kbin.social
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          1 year ago

          You can’t make a 3 sided object with 4 sides. It’s no longer a triangle and is a square. It’s the definitions themselves. Non-euclidian geometry would allow the angles to equal more than 180°, but not to “add a side”.

          • simplecyphers@lemmy.world
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            1 year ago

            Mathematicians dont want to to know this one strange trick, hide a secret corner of 180 degrees in any triangle to instantly make it a quadrilateral, without even changing the shape!!

          • W1Z_4RD@lemmy.world
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            1 year ago

            “Not to scale”

            . .

            Incase that is still a mystery to you, that means that the drawing is visually inconsistent with the finished part. That 180 degree ‘corner’ is effectively a straight line, if drawn to scale.

              • simplecyphers@lemmy.world
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                1 year ago

                Technically you are “right” but you are also being obtuse (pun intended).

                If you could bare to stretch your mind, and realize “not to scale” means “trust the numbers, not the graphic” you could in turn, realize that it is, in fact, 3 sided.

                Every side of every shape is made up of infinite 180 degree angles and 2 angles that are different. Every. Single. One.

              • mozzarellamommy@waveform.social
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                1 year ago

                My school used to put a right angled triangle in the test and then say “not to scale” and then the angles would actually make it an isosceles or whatever. I agree with you that scale should keep proportions but yeah for some reason It’s not common knowledge.

    • radix@lemm.ee
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      1 year ago

      Why does it have to be non-Euclidean geometry? It seems like it would work fine as a regular (normal? Euclidean?) 30-30-60 triangle.

      Edit: I can’t read. 30-60-90 triangle.

    • Lorgres@lemmy.world
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      1 year ago

      The 180° angle is just a (really weird) way of representing a long, straight, line. The rest of the angles add up to 180°.