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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 |