How Do I Find The Complement And Supplement Of An Angle?

Complementary angles add to 90 degrees. Supplementary angles add to 180 degrees.

To find the complement of an angle, subtract its measure from 90 degrees.
To find the supplement of an angle, subtract its measure from 180 degrees.

Complement   subtract 90 from measure

supplement   subtract 180 from measure

A complimentary angle is between 0º and 90º so to find the compliment of an angle you have to say for example:

Find the compliment of 6º, it is acute. (because 6º is acute)
Find the compliment of 80º, it is also acute.

Then the supplement of an angle is between 90º & 180º so to find the supplement of an angle you do this for example:

Find the supplement of 105º, it is Obtuse (because 195º is obtuse)
Find the supplement of 200º, it is also obtuse.

I hope this helps - I'm only in year 7!!!