Plus One Polyamory

Plus One Polyamory, also known as Exterior Angled Polyamory is a type of quad polyamorous relationship structure in which three people have a triad and one person is also dating someone else. For example: A, B, and C are all dating each other. A is also dating D. B and C are not dating D. The individual who is not part of the triad may or may not identify as polyamorous, but they still consent to their partner having other partners.

History
The term plus one polyamory was coined on February 11, 2021 by Cryptocrew.

On the 22nd of July 2021 another name for the term was coined by FANDOM user TheNelsonSystem and Tumblr user icarusoblivion, Exterior Angled Polyamory. This was due to the original name being offensive to some as it implied that 'individual D' was just a plus one and was less than the others, which is not true for the term.

Flag
The flag was created by Cryptocrew on February 1, 2021. Light blue represents peace, dark blue represents consent, white represents unity, purple represents attraction (of any kind), green represents kindness, and yellow represents dedication.

An alternate flag was made along with the coining of Exterior Angled Polyamory. It was created on the 22nd of July 2021 by Tumblr user icarusoblivion. The green represents trust, the purple represents love (of one or more beings), the blue and pink represent communication, and the shape resembles a triangle with an exterior angle.