Welcome! Happy Friday!butlerihs.weebly.com/.../8/6/8/38686183/sq_2.4_and_part_of_2.5_sep… · 2.4...
Transcript of Welcome! Happy Friday!butlerihs.weebly.com/.../8/6/8/38686183/sq_2.4_and_part_of_2.5_sep… · 2.4...
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Your Friday Funny!
Please pick up your name tag and take your homework and protractor.
Welcome! Happy Friday!
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Answers for section 2.22-28 even, 29-38 all
(all units are degrees)2. 120 4. 140 6. 858. 70 10. 20 12. 10014. 125 16. 15 18. 50
20. 22.
24. 26. 77 degrees, point B 28. No
29. 30.
31.
33. 34.
32.
35. 36.
37. 38.
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54o
102o
32o
32o
2.2 Answers (Con't.)
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26.
28.
0180
10170
20160
30
15040
140 50
13060
120
70
110
80
100
90
90
180°
100
80
110
70
120
60
130
50
140
40
150
30
16020
170 10
180 0
2.3 Answers
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2.4Defining Line and
Angle Relationships
• Parallel lines Two or more lines that lie on the same plane that do not intersect.
• Perpendicular Lines Two lines that intersect at 90o.
• Skew lines Two lines in different planes that do not intersect.
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Some examples of skew lines:
Which of the following are skew lines?
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• Pair of complementary angles Two angles whose measures have the sum of 90o
• Pair of supplementary angles Two angles whose measures have the sum of 180o
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What is the complement of 42o?
What is the supplement of 92o?
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• Vertical angles
• Linear pair of angles
Which angle is a vertical angle with
?A
D
C
B
E
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Which angles are linear pairs with ?
AD
C
B
E
What do you think...true or false?
Through a given point not on a given line there is one and only one line that can be constructed parallel to the given line.
True
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2.5Defining Polygons
• Polygon A closed geometric figure in a plane in which line segments connect endpoint to endpoint and each segment intersects exactly 2 others.
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• Side of a polygon Each line segment of a polygon.
• Vertex of a polygon Each endpoint where sides of a polygon meet.
• Convex polygon A polygon in which no segment connecting two vertices is outside the polygon.
• Concave polygon A polygon in which at least one segment connecting two vertices is outside the polygon.
Sketch a convex polygon
Sketch a concave polygon