The sum of all interior angles in a polygon is
180(n-2), where n = sides, well, this is a QUADrilateral, so it has 4 sides, so the total is 360°.
now, let's find what angle C is first,
now, recall the "inscribed quadrilateral conjecture", where opposite angles are "supplementary angles", thus
180(n-2), where n = sides, well, this is a QUADrilateral, so it has 4 sides, so the total is 360°.
now, let's find what angle C is first,
now, recall the "inscribed quadrilateral conjecture", where opposite angles are "supplementary angles", thus