The answer depends on which variable is missing.
Chat with our AI personalities
butty mutt
180 minus two known angles = unknown angle
Given a shape as such... ______________________________________ / A=72 B=65 \ \ / \_C=105__________________D=110_______/ (sorta) You take the interior angles that you have and subtract them from 360 to get their supplementary angles, which would be the measure of the outside angles corresponding to the interior angles Measure of <A= 72- so 360- 72=288*; so the measure of the exterior angle corresponding to <A is 288* You can do the same thing for the rest of the angles in the polygon. Hope it helps...
The total of the three interior angles in a triangle is 180 degrees. if you know two of the angles, subtract them from 180 and that gives you the third angle.
Have a look inside the back of your sofa. Or can you remember where you used it last? Alternatively, you could be more helpful in asking your question. Missing angle from what? What information is available?