what is a supplementary angle?

http://www.mathsisfun.com/geometry/supplementary-angles.html

Thank you but do you think you could tell me what it is? My computer will make me exit out of internet when i go on the website you wrote i should go to. If you could it would help me so much!

never mind i got it now

Supplementary Angles

Two Angles are Supplementary if they add up to 180 degrees.

These two angles (140° and 40°) are Supplementary Angles, because they add up to 180°.

Notice that together they make a straight angle.

-- from the Math is Fun website.

oh okay thank you i just realized that i can just tyoe it in instead. Thank you for helping me. I would like to ask, you are so good at helping students why don't you teach anymore?

I don't teach any more (for pay) because I retire after 32 years of teaching. That's enough, don't you think? <g>

Besides, I'm now 77 years old.

oh but thanks for helping me

You're very welcome.

A supplementary angle is an angle that, when combined with another angle, adds up to 180 degrees. In other words, if two angles are adjacent (they share a common vertex and side) and the sum of their measures is 180 degrees, they are supplementary angles.

To identify supplementary angles, you can follow these steps:

1. Start by identifying the two angles in question. Let's call them angle A and angle B.

2. Add the measures of angle A and angle B. If their sum equals 180 degrees, then they are supplementary angles.

For example, if angle A measures 60 degrees, angle B would need to measure 120 degrees for the two angles to be supplementary (60 + 120 = 180).

Remember that supplementary angles do not need to be adjacent or even connected to each other, as long as their measures add up to 180 degrees.