Inscribed Quadrilateral ?
1 Answer
Aug 26, 2016
The quadrilateral is a regular quadrilateral.
Explanation:
If the points lie on a circle with radius
or equivalently
and
(Here we used de Moivre's identity
grouping and squaring both sides
and adding side by side we get at
or
grouping now
we get at
So we can conclude that the quadrilateral is a regular quadrilateral.