1. True False Each vertex is not the endpoint of exactly two sides

2. A quadrilateral with exactly one pair of parallel sides. The two parallel sides are called the bases of the trapezoid. Trapezoid

3. A trapezoid with opposite nonparallel sides that are congruent. Isosceles Trapezoid

4. A quadrilateral in which two adjacent sides are congruent, and the other two adjacent sides are congruent as well. Diagonals are always perpendicular. Opposite angles are always congruent. kite

6. A B C G H I K L

8. 3. sometimes 2. always 6. sometimes 4. sometimes 7. sometimes 5. sometimes 8. never