Kelly has 55 different books. She gives 20 of the books to her friend. How many books does kelly have now?
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This shape is trapezoid
top of the trapezoid is 10 (12-2)
and the bottom is 4 (6-2)
the height in 3 (3-0)
so the area will be
the area is 21
top of the trapezoid is 10 (12-2)
and the bottom is 4 (6-2)
the height in 3 (3-0)
so the area will be
the area is 21