Post on 01-Jan-2016
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Lesson 10-3 Pages 422-425
Angle Relationships
What you will learn!
How to identify and apply angle relationships.
Vertical anglesVertical anglesCongruent anglesCongruent anglesSupplementary anglesSupplementary anglesComplementary anglesComplementary angles
What you really need to know!
Angles that have the same measure are called congruent angles.
Two angles are supplementary if the sum of their measures is 180.
What you really need to know!
Two angles are complementary if the sum of their measures is 90.
What you really need to know!
What you really need to know!
When two lines intersect, they form two pairs of opposite angles called vertical angles, which are always congruent.
Vertical Angles!
RightLeft
Up
Down
Classify the pair of angles as complementary, supplementary, or neither.
Example 1:
128° 52°
Classify the pair of angles as complementary, supplementary, or neither.
Example 2:
yx
Example 3:
Angles PQS and RQS are supplementary. If m PQS = 56°, find m RQS.
180° - 56° = m RQS
124° = m RQS
Example 4:
The rectangle shown is divided by a diagonal. Find the value of x.
70°x 90° - 70° = x
20° = x
Page 424
Guided Practice
#’s 3-9
Pages 422-423 with someone at home and study
examples!
Read:
Homework: Page 424-425
#’s 10-27 all
#’s 30-42
Lesson Check 10-3
Link to Lesson 10-3 Review Problems
Page
587
Lesson 10-3