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Section 1-4 Measuring Angles and Segments

Section 1-4 Measuring Angles and Segments. _______________________. What is the measure of segment DC? What is the measure of segment DE? What is the measure of segment BC?. Postulate 1-5.

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Section 1-4 Measuring Angles and Segments

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  1. Section 1-4 Measuring Angles and Segments

  2. _______________________ • What is the measure of segment DC? • What is the measure of segment DE? • What is the measure of segment BC?

  3. Postulate 1-5 • The distance between any two points is the absolute value of the difference of the corresponding numbers AB | A – B |

  4. Congruent • Two segments with the same length are congruent.  • Segment BC  DE is it the same as BC = DE

  5. Segment Addition Postulate • If three points A, B and C are collinear and b is between A and C, then AB + BC = AC

  6. Angle • Is formed by two rays with the same endpoint

  7. Types of Angles • Angles are measured in degrees • Protractor – measures angles • Acute Angle – degree measure between 0 and 90 degrees

  8. Types of Angles • Right Angle - measures exactly 90 degrees • Obtuse Angle – measures between 90 and 180 degrees. • Straight Angle – measures exactly 180 degrees

  9. Angle Addition Posulate • Ex:

  10. Pg 30 • #32

  11. Homework pg 28-29 2-16evens #13, 28, 33-35

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