1. DEF TRAPEZIOD = A convex QUADRILATERAL WITH EXACTLY ONE PAIR OF PARALLEL SIDES
2. A = 1/2h(b1+b2)
3. MIDSEGMENT = AVERAGE OF B1 AND B2
4. THESE ARE BASES
5. THESE ARE LEGS
6. IN AN ISOCELES TRAPEZOID, THESE ARE THE SAME
7. AND THESE ARE THE SAME
8. THIS + THIS = 180 DEGREES