Page 4. Line, segment and angle Postulates Line and Segment Postulates Line – a line contains at least 2 points. Plane – contains at least 3 noncollinear.

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Presentation transcript:

Page 4

Line, segment and angle Postulates

Line and Segment Postulates Line – a line contains at least 2 points. Plane – contains at least 3 noncollinear points.

Line and Segment Postulates Intersecting planes- The intersection of 2 planes is a line.

Line and Segment Postulates Segment addition postulate – given 3 collinear points, AB+BC=AC ABC ABBCAC + =

Angle Postulates Angle addition postulate – if B is in the interior of angle AOC, then A O C B 20º 45º

Angle Postulates Linear pair postulate – if 2 angles form a linear pair, they are supplementary O A B 30º C B 150º O AC B 30º 150º O

Page 6

L N M

R T S

Page 7

W Y X

Page 8 Two angles are adjacent if they share a common vertex and common side, but have no interior points in common. They share a common vertex and common side, but have no interior points in common. They do not share a common vertex. They share a common vertex and common side, but have no interior points in common. They have interior points in common.

Page 8

Perpendicular Lines and Planes

Page 9 Perpendicular Lines and Planes

Page 8 Perpendicular Lines and Planes

Page 10 Perpendicular Lines and Planes

Page10 Perpendicular Lines and Planes

Page 10 Perpendicular Lines and Planes

Homework Page 8 #2-12 evens, 6 do only parts a,b,f