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This is not a trapezoid. For all trapezoids (in plane Geometry), the two sets of side angles must be supplementary, or add to 180. No two angles given are supplementary.

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Q: If a trapezoid has a one hundred degree angle and a sixty-five degree angle and a seventy-five degree angle what is the measure of the fourth angle?

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A regular trapezoid (!) is a square. And each interior angle of a square is 90 degrees.

Only when it is an isosceles trapezoid otherwise no.

Area of a trapezoid = 0.5*(sum of parallel bases)*height Need to know the measure of the other base

No. But they add up to 180 degrees.

A quadrilateral may have all 4 angles different if it is not a square, rectangle, rhombus, rhomboid, rectangular trapezoid, isosceles trapezoid, or parallellogram.

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Simply measure it and the parallel bases of a trapezoid will have different lengths.

There is no figure to be seen but an isosceles trapezoid will have equal base angles.

There is no figure to be seen but an isosceles trapezoid will have equal base angles.

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360 degrees.

The answer will depend on what information you do have!

There is no figure to be seen but an isosceles trapezoid will have equal base angles.

A regular trapezoid (!) is a square. And each interior angle of a square is 90 degrees.

Only when it is an isosceles trapezoid otherwise no.

Area of a trapezoid = 0.5*(sum of parallel bases)*height Need to know the measure of the other base

No. But they add up to 180 degrees.

A quadrilateral may have all 4 angles different if it is not a square, rectangle, rhombus, rhomboid, rectangular trapezoid, isosceles trapezoid, or parallellogram.