• PM_Your_Nudes_Please@lemmy.world
    link
    fedilink
    arrow-up
    2
    ·
    edit-2
    1 month ago

    The triangles aren’t drawn to scale. The middle line isn’t a 90° angle, because it isn’t specifically marked with a square angle in the corner. Triangles always add up to 180°, so the angle in the left triangle is actually 80°, not 90°.