How do you find missing angle in a quadrilateral? - Answers

The general method of solving any math problem is: Use the information you'regiven to find the missing information.Since you've mentioned the "missing angle", I'm going to assume that you knowthe sizes of the other three. If I don't make some kind of assumption like that,then it's totally impossible to work with your question, because you've said nothingabout what you do know about the quadrilateral.Now, here's a characteristic that's true of ALL quadrilaterals: The four interior anglesof every quadrilateral always add up to 360 degrees.Knowing that fact, and knowing the sizes of three of the angles, you can subtract themfrom 360 degrees, and the remaining degrees all belong to the one missing angle.