Urethrorrhagia refers to urethral bleeding in the absence of urine associated with dysuria and blood spots on underwear after voiding. This condition, which often occurs in prepubertal boys at intervals several months apart over a period of many years, has a benign self-limited course.
Definition: A trapezoid is a quadrilateral that has only one pair of parallel sides. The non parallel sides of a trapezoid are called legs. Definition: A parallelogram is a quadrilateral that has both pair of opposite sides parallel. Definition: An isosceles trapezoid is a trapezoid, whose legs have the same length. It is clear from this definition that parallelograms are not isosceles trapezoids.
Base Angle Theorem states that if two sides in a triangle are congruent, then the angles opposite to these sides are also congruent. Base angles of an isosceles triangle are equal.