AAAMath.com
Sorted by Grade Level
 Contact AAA Math       Spanish version     New!! AAAMath lessons translated to over 100 languages

Sorted by Subject

Complementary or Supplementary Angles Learn Contents and Search
 Practice Next Lesson
 Play Previous Lesson
 Explore  Feedback

 

Complementary or Supplementary Angles

Two angles are complementary if the sum of their angles equals 90o.
If one angle is known, its complementary angle can be found by subtracting the measure of its angle from 90o.

Example: What is the complementary angle of 43o?
Solution: 90o  -  43o  =  47o

Two angles are supplementary if the sum of their angles equals 180o.
If one angle is known, its supplementary angle can be found by subtracting the measure of its angle from 180o.

Example: What is the supplementary angle of 143o?
Solution: 180o  -  143o  =  37o






Practice

Are the Angles Complementary, Supplementary or Neither?




You have correct and   incorrect.  This is percent correct.

Return to Top



Play
GameWhat is it?Best Score
How many correct answers can you get in 60 seconds?
Extra time is awarded for each correct answer. Play longer by getting more correct.
How fast can you get 20 more correct answers than wrong answers?

Sudoku

Return to Top

Explore
Math Lessons by Grade
Math Topics

How do AAAMath lessons map to Common Core State Standards?


Try our new mobile friendly design at aaaKnow.com



Math Resources

Spelling Lessons by Grade

Vocabulary Lessons by Grade

Geography

Return to Top



Copyright © 2012 J. Banfill. All Rights Reserved. Legal Notice