The bottom of an isosceles trapezoid is twice as big as the top, the base angle is 45 degrees, the height is 3cm, and the area of this trapezoid is () square centimeter Explain why, try to answer so that pupils can understand

The top and bottom are X
Then the bottom is: 3 + 3 + x = 2x
The solution is x = 6
So the area is: 1 / 2 * (6 + 12) * 3 = 27

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