A is somewhat shorter than B and C, which are almost equal, ...

Description: A is somewhat shorter than B and C, which are almost equal, conforming a more or less isosceles triangle little higher than the equilateral. To my understand, if is a twin, this triangle should be isosceles but slightly lower than equilateral. Pictures were taken perpendicular to sagenite plane. Measurements based on photos are not very reliable data but can be a clue.