Explanation of complementary, supplementary, and vertical angles.
3 Pages: Handout (Lesson) / Worksheet / Key
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Page 1 is a handout that clearly and concisely articulates the definitions of complementary, supplementary, and vertical angles, complete with diagrams and examples. The vertical angles theorem (that they're equal) is also defined.
Page 2 is an 20-question worksheet with room for student work.
Page 3 is the KEY for Page 2 (questions with answers).
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Copyright 2009, Thad J. Ackerman
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.

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15+ years teaching high school mathematics (all levels: basic, college-prep. and honors) Experience tutoring high school, college (undergraduate & graduate), and adult learners in mathematics, SAT & GRE test prep., and engineering. Started own financial advisory firm, Silver Maple Financial, LLC, and am a licensed financial advisor. Strong interest in finances of individual investing: compound interest, dollar-cost averaging, mutual funds, investing for retirement, etc. Worked for IBM as a computer programmer during college and for 3 years after college, then tutored while going back to school to be an educator. Never looked back! Best move I ever made! :-)
