a polygon whose angles are all congruent
a polygon in which all sides are congruent
a trapezoid with congruent legs
a quadrilateral with two pairs of adjacent sides congruent and no opposite sides congruent
a quadrilateral whose opposite sides are both parallel and equal in length
a parallelogram with four right angles
A polygon with all sides congruent and all angles congruent
a parallelogram with four equal sides
a quadrilateral with exactly one pair of parallel sides
a proof in which you prove that a statement is true by first assuming that the opposite is true
all possibilities are considered and then all but one are proved false.
the point of concurrency of the medians of a triangle
the point of concurrency of the perpendicular bisectors of a triangle.
point of concurrency for altitudes
segment from a vertex to the midpoint of the opposite side
the point of concurrency of the angle bisectors of a triangle