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?
butty mutt
The answer depends on what information you do have!
All the angles of a square are 90 degrees.
Subtract the two known angles from 180 degrees will give you the missing angle
The answer depends on what information you do have and what is missing. There is no single answer for all situations.
180 minus two known angles = unknown angle
to find missing angles you are dealing with complementry and suplementry angles. Suplementry angles add up to 180 degrees so you must subtract what given angle you have from 180 and you come up with youre missing angle. This rule also gos for complementry but the angles must add up to 90 degrees
take away the interior angle adjacent to it from 360
you add the three other angles and subtract that from 360
If you are trying to find the missing angle of a triangle you do 180 degrees minus your two other angles. However if you are trying to find the missing angle of a quadrilaterals you do the same thing but with 360 degrees.
An equation with a variable is a math problem with a missing number that you have to find out using some specific steps that you are taught. Example: 4+n=5. If you want to find out what the variable is, you have to do the OPPOSITE OPPERATION and find it out. So I would take the answer, and do the opposite operation and then the answer is the variable. Of course there are MUCH harder variable equations. :D
the angles of a quadrilateral will add up to 360 degrees, so if you have the angles of the first three vertices, you can find the measure of the last one by subtracting the sum of all the other angles from 360.