The Best answer out of the answers above is option 3. A trapezoid has only 1 set of parallel sides.
Hope this Helps! ~Giz
When you add a zero to the problem, it shows you are now multiplying in the double-digits. Let's say you are multiplying 12x12. First you cover up the one then multiply them. Then cover up the two and you have 10. When you multiply them, it ends in a zero. Don't think of it as adding a zero but adding to products.
Each term after the first is obtained by multiplying the previous one by -3 so the answer is -81 , 243
