• fishos
      link
      fedilink
      81 year ago

      A triangle with 90° angles, yes.

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

      • TheDankHold
        link
        fedilink
        131 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
          link
          fedilink
          -9
          edit-2
          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
            link
            81 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
            link
            71 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.

            • fishos
              link
              fedilink
              -71 year ago

              Lmao that IS NOT how “scale” works. Proportions stay the same.

              • @simplecyphers
                link
                51 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.

              • @[email protected]
                link
                fedilink
                3
                edit-2
                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
      link
      fedilink
      5
      edit-2
      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.

  • @[email protected]
    link
    fedilink
    31 year ago

    Sum of interior angles of a triangle should be 180° so this is not a triangle. It is a square or maybe 2 triangles

    • @Lorgres
      link
      91 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°.