COMPLEMENTARY & SUPPLEMENTARY ANGLES 1.5 Describing angle pair relationships: Mr. Saucedo Milby High School
1.5 describe angle pair relationships
Jun 23, 2015
Lesson to be used with complementary and supplementary angles topic.
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COMPLEMENTARY & SUPPLEMENTARY
ANGLES
1.5 Describing angle pair relationships:
Mr. SaucedoMilby High School
OBJECTIVE
We will use angle relationships to find angle measures.
VOCABULARYADJACENT ANGLES
Definition Two angles that share a common vertex and common
side.
Visual
adjacent non adjacent
VOCABULARY:COMPLEMENTARY ANGLES
Definition Two angles that add up to 90 degrees.
Visual
VOCABULARYSUPPLEENTARY ANGLES
Definition Two angles that add up to 180 degrees.
Visual
CHECKPOINT
TRUE OR FALSE? Angle ABC and CBD are complementary. Angle KHJ and IHJ are supplementary Angle CBD and angle KHJ are adjacent.
CHECKPOINT
True or false? <ABC and <DBC are
complementary?
HOW TO REMEMBER?
CHECKPOINT
What is the relationship between angles 1 and 2?
GUIDED EXAMPLES
Given that angle a is a complement of angle b and that m<a = 68, find m<b.
GUIDED EXAMPLES
Given that m<2 is a supplement of <2, and m<2 = 56, find m<1.
GUIDED EXAMPLES
Given that the two angles below are complementary; and that m<FED=4x + 8, and m<CBA = x + 2, find the measure of each angle.
BIG QUESTIONS
How do we identify (or prove) that two angles are complementary?
How do we identify (or prove) that two angles are supplementary?
Adjacent angles share a _____ and a ________.
INDEPENDENT WORK
TEXTBOOK, Page 38
PROBLEMS: 1, 4, 5, 6, 8, 10, 12, 14, 16, 18, 34, 35, 36, 37, 38.
HOMEWORK
WORKBOOK, Page13
PROBLEMS: 1, 3, 5, 7, 17, 22, 23, 24, 25, 29
Pre-AP: Add problem #38.
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