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1.3 Measuring Segments. Objective: Students will find measures of segments. Correct notation will be used. Line Segments. Since segments have 2 endpoints, it can be measured. Line segments are named with two capital letters that correspond to the 2 endpoints.
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1.3 Measuring Segments Objective: Students will find measures of segments. Correct notation will be used.
Line Segments • Since segments have 2 endpoints, it can be measured. • Line segments are named with two capital letters that correspond to the 2 endpoints. • When segments have the same measure, they are said to be congruent. (The same number of tick marks on a segment show congruence)
Calculate Measures • On line AC, if B is between A and C, then A, B, and C are collinear and the following things are true • AB + BC = AC • AC – AB = BC • AC – BC = AB A B C
Examples Find all segments if Y is between X and Z. (find XY, YZ, XZ 1. XY = 5a, YZ = a, and XY = 25 2. XY = 12, YZ = 2c, and XZ = 28 3. XY = 2m+1, YZ = 6m, and XZ = 81 4. Find the value of all segments if L is between N and M, NL= 6x-5, LM= 2x+3, and NM= 30.