An angle is 45 degrees, which means that the drawn triangle is an isosceles right triangle, so the bottom of the triangle is equal to the height, that is, the area of the triangle is equal to 1/2*5*5. According to the characteristics of the parallelogram, the diagonal of the 45-degree angle of the parallelogram is also 45 degrees, and the area of the triangle formed is also 1/2*5*5, so the parallelogram is left.

To sum up, the area of parallelogram is 1/2*5*5*2+5*5=50 cm2.