The 4 interior angles of any trapezoid, including those that are isosceles, always add up to 360 degrees
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Two angles must be equal and when added to the third angle should total 180 degrees.
What total do you mean? area? volume? or other mathematical terminologies? or do you mean the total sides of an isosceles triangle? LOL :)) well its angle total will have to be 180 no matter what because each triangle has an interior angle sum of 180. SO yea...................... that is why. :)
The 4 interior angles add up to 360 degrees
The interior angle of an n-sided polygon total 90(2n - 4) degrees
900 degrees