



 
Hi Hannah, The words trapezium and trapezoid meanings in Canada and the United States which are contradictory to their meanings in the rest of the world. Look them up in Wikipedia to see what I mean. Since you are in Australia the word trapezium is appropriate here. The area of the base is easy to calculate and the top is an open, thus to complete the solution you only need to calculate the areas of the four congruent sides. These are isosceles trapeziums. The area of a trapezium can be found in my response to an earlier question (notice I called it a trapezoid).Since you know the area of the square opening at the top of the vase you can find the length of the shorter of the two parallel sides of the trapezium. To find the distance between the parallel sides you can use Pythagoras' theorem. Penny  


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