4. (15 pts) A field has five straight edges of lengths 8, 10, 11, 5, and 18 in order. The distance from the first to the third vertex is 14 and from the third to the fifth is 12. What is the area of the field? Express what is the meaning of that example in the history of Mathematics.
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Step 1: Use the formula for the area of a trapezoid, which is (1/2) * (sum of parallel sides) * (distance between them). Show more…
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