Bellwork 1.What is the intersection of plane YXW and plane UTV? 2.Is R on plane STW? 3.B is between D and E. If DE = 2.5 and BD = 1.3, what is BE?

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Presentation transcript:

Bellwork 1.What is the intersection of plane YXW and plane UTV? 2.Is R on plane STW? 3.B is between D and E. If DE = 2.5 and BD = 1.3, what is BE?

1.5a Angle Relationships Students will be able to identify if two angles are adjacent, vertical, supplementary, complementary or a linear pair.

Angle Pairs Special PairsDefinition Keyword ExampleNon-Example

Example 1 Draw the diagram and name the following: a)Vertical angles: b)Obtuse vertical angles: c) Linear Pair: d) Complementary angles: e) Supplementary angles:

Example 2 The, what is the measure of its… Complement? Supplement?

Perpendicular (Defn)--Toolbox If two lines (segments, rays) form a 90° angle, then they are perpendicular ( ).

Example 3 Find x so that.

Ticket to Leave 1. Name an angle adjacent to. 2.Name an angle vertical to. 3.Name an angle that forms a linear pair with. 4.Name an angle that is supplementary to.

Homework Worksheet

Adjacent Angles (Defn) they overlap Example Non-example are adjacent angles

Pairs of Angles (cont’d) Vertical angles- nonadjacent angles formed by two intersecting lines. not adjacent ExampleNon-example If two angles are vertical, then ______________________ <1 and <3 <2 and <4

Pairs of Angles (cont’d) Linear Pair- adjacent angles whose noncommon sides are opposite rays. The angles form a linear pair. - not straightExampleNon-example If you have a linear pair, then ______________________