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geometry chapter 1
for honors geo. ch 1 vocab
| Question | Answer |
|---|---|
| point | location, has no size |
| line | set of points extending in opposite direction without end |
| plane | flat surface, has no thickness |
| space | the set of all points |
| collinear points | points that lie on the same line |
| coplanar points | points that lie on the same plane |
| segment | part of a line with 2 end points and all points in between |
| ray | part of a line consisting of 1 endpoint and all points on 1 side of an endpoint |
| opposite rays | 2 collinear rays with the same endpoint |
| congruent segments | 2 segments with the same length |
| midpoint | point that divides a segment into 2 congruent parts |
| angle | 2 rays with the same endpoint |
| acute | angle less than 90 |
| obtuse | angle larger than 90, but less than 180 |
| right | 90 |
| straight | 180 |
| congruent angles | 2 angles with the same measure |
| vertical angles | 2 angles whose sides are opposite rats |
| adjacent angles | 2 angles with a common side, common vertex and no common interior points |
| complementary angles | 2 angles where some =90 |
| supplementary angles | 2 angles whose sum=180 |