Flashcards: Unit 1: Concept 4: Measuring Segments & Angles
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Created by:
lezlietyson on August 22, 2009
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Vocabulary & Postulates from 1-4
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Terms | Definitions |
|---|---|
 segment addition postulate | If three points, A, B, & C are collinear and B is between A and C, then AB + BC = AC. |
| angle addition postulate | If point B is in the interior of ∠AOC, then m∠AOB + m∠BOC = m∠AOC AND if ∠AOC is a straight angle, then the two angles add to 180° |
| congruent segments | segments with the same length |
| "is congruent to"/ equal in measure, similar in shape | ≅ |
| midpoint | divides a segment into two congruent segments |
| acute angle | greater than 0° but less than 90° |
| right angle | exactly 90° |
| obtuse angle | greater than 90° but less than 180° |
| straight angle | exactly 180° |
| congruent angles | two angles with the same measure |