Math problem

What is the area of the trapezoid whose side measures a = 12 cm and b = 10 cm and height measures h =5 cm?
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Solution: solved geometry answers
Trapezoid consists of 4 sides in which 2 sides are parallel.
Area of the trapezoid = (a + b) * h
= (12 + 10) * 5
= (22) * 5
= 11 * 5
Area of the trapezoid = 55 cm²