Trapezoids Section 5-5
Trapezoid A quadrilateral with exactly one pair of parallel sides. The other pair is not allowed to be parallel
Parts of a trapezoid Bases Legs The parallel sides The non-parallel sides leg base base leg
Isosceles Trapezoid A trapezoid with congruent legs
Theorem 5-18 Base angles of an isosceles trapezoid are congruent
Median A segment that connects the midpoints of the legs of any trapezoid median
Theorem 5-19 The median of a trapezoid: Is parallel to the bases Has a length equal to the average of the bases 20 35 50