The sum is of course is 450x690 also sharing the equilateral triangles to one side makes it an even number. To explain your answer copy as I have written exactly and you will be sure to get this question correct.
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False, the sum of the angles in a parallelogram is 360 degrees.
The sum of the four interior angles is 360 degrees.
The sum of the interior angles of any n-sided plane figure is (2n-4) right angles. In your case n = 4 so sum is 4 right angles ie 360 degrees.
The sum of the internal angles in a parallelogram is 360 degrees. Since there are two equal pairs of angles measuring the same, then each of the second pair of angles is equal to (360 - (35 x 2)) / 2 = 145 degrees.
Not unless the parallelogram is a rectangle. In every parallelogram, consecutive angles are supplementary.