how to find the missing angle??

In what figure? With what information already provided?

a2+b2=c2

pythagorean theorem it's symple =P

To find the missing angle, you will need to gather information about the given angles in your problem. Once you have all the necessary information, you can use various methods depending on the type of problem.

Here are a few common methods to find a missing angle:

1. Triangle: If you have a triangle, you can use the fact that the angles of a triangle add up to 180 degrees. So, if you know the measures of two angles in the triangle, you can subtract their sum from 180 to find the missing angle.

2. Right Triangle: In a right triangle, one angle is always 90 degrees. If you have the measures of two angles and one is 90 degrees, then the third angle can be found by subtracting the sum of the known angles from 90.

3. Parallel Lines: If you have parallel lines intersected by a transversal, you can use the fact that corresponding angles are congruent. So, if you have a pair of corresponding angles and one angle is known, the other angle will have the same measure.

4. Supplementary Angles: If you have two angles that are supplementary (their sum is 180 degrees), you can find the measure of one angle by subtracting the given angle from 180.

5. Complementary Angles: Similarly, if you have two angles that are complementary (their sum is 90 degrees), you can find the measure of one angle by subtracting the given angle from 90.

Remember to write down all the given angle measures and apply the appropriate method to find the missing angle. Always double-check your work to ensure accuracy.