Name three collinear points.

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Presentation transcript:

Name three collinear points. A. A, B, Q B. B, Q, T C. A, B, T D. T, A, Q

What is another name for AB? A. AA B. AT C. BQ D. QB

Name a line in plane Z. A. AT B. AW C. AQ D. BQ

Name the intersection of planes Z and W. A. BZ B. AW C. AB D. BQ

How many lines are in plane Z? B. 4 C. 6 D. infinitely many

Which of the following statements is always false? A. The intersection of a line and a plane is a point. B. There is only one plane perpendicular to a given plane. C. Collinear points are also coplanar. D. A plane contains an infinite number of points.

Section 1.2 Linear Measure! L.T.#1: Be able to use the Segment Addition Postulates to find the lengths of segments and the values of variables! Line Segment: A line that has 2 endpoints and can be measured Find the length of segment AB. A B

Congruent Segments: segments with the same __________ ; length Is AB BC? If so, why? Yes because they have the same length. A B C 3 8 13 Notation is important! AB BC is read “segment AB is congruent to segment BC.” AB = BC is read “the length of segment AB is equal to the length of segment BC.”

Adding and Subtracting Segments: Betweenness of Points: You can find the length of a segment by adding together two smaller segments. A B C Find the length of AC. A B C 13 6 Find DE and EF. Does this check? (add up to 50?) Find the length of AB if AC = 22 A B C 10

Adding Segments If DF = 50, find the value of x. Solve for c and YZ if Y is between X and Z. XY= 11, YZ = 4c, and XZ = 83 D E F 2x - 8 3x - 2