what is supplementary and complementary angle

supplementary angles r those whose sum is 180 degree

complementry angles those whose sum is 90 degrees

got it

 When 2 angles sum up to 90degree, they r complimentry.

 When 2 angles sum up to 180 segree , they r supplementry.

 supplementry angle= 180 Degree 

Complementry angle= 90 Degree

 Complementary angles:Two angles are said to be complementary,if their sum is one right angle i.e. Each angle is complementary of the other.

Supplementary angles:Two angles are said yo be supplementary, if their sum is two right angles i.e. Each angle is called supplement of the other.

Complementary angles:

Two angles whose measures add to 90 degrees. It is easy to see when the angles are adjacent like the following:
 

 

Angles x and y are adjacent because they share a ray (line in black) and a vertex (point in black called D).

Now why are they complementary?

Notice also that the angle in blue measures 90 degrees

Since the measure of angle x plus the measure of angle y = 90 degrees, x and y are complementary

Angles do not have to be adjacent to be complementary. The following angles are also complementary as long as the sum of the measures equal 90 degrees

 

Two angles whose measures add to 180 degrees. It is easy too to see this when the angles are adjacent like the following:

 

Again, angles a and b adjacent because they share a ray (line in black) and a vertex (point in black called D), so they are adjacent angles.

Now why are they supplementary?

Notice also that the angle in blue measures 180 degrees because the angle is a striaght line and a straight line measures 180 degrees

Since the measure of angle a plus the measure of angle b = 180 degrees, a and b are supplementary

Again, angles do not have to be adjacent to be supplementary. The following angles are also supplementary as long as the sum of the measures equal 180 degrees

i read it on wiki.answer.com when i was in class 7th. this is why i posted you the site

 TWO ANGLES ARE SAID TO BE COMPLEMENTARY ANGLES IF THEIR MEASURE ADD UP TO 90 DEGREES.

 TWO ANGLES ARE SAID TO BE SUPPLEMENTARY  ANGLES IF THEIR MEASURE ADD UP TO 180 DEGREES.