Asked by Sarah

A brick patio has the approximate shape of a trapezoid. The patio has 16 rows of bricks. The first row has a = 13 bricks and the 16th row has b = 28 bricks. How many bricks are in the patio?
Answered by KG
223
Answered by Reiny
Just blurting out an answer, especially if it is wrong, serves no purpose

sum = (n/2)(first + last)
= 8(13+28)
= 328

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