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g e o m e t r y.
vocabulary
Question | Answer |
---|---|
space | space is a boundless 3-dim ensional set of all points. |
intersecting planes | intersecting planes share an infinite number of points. |
plane | a plane is a flat surface that has no thickness. |
postulate | a statement accepted to be true without proof. |
line segment | a line segment is a portion of a line betweentwo points called endpoints. |
point | a point has no length, no width, or thicknes, but has a position. |
opposite rays | opposite rays start at the same point. |
ray | a ray is a part of a line that consist of an initial point. |
parallel lines | parallel lines are coplanar lines that do not intersect. |
coplanar | figure in the same plane |
angle | formed by two rays with the same endpoint. |
coordinate | a point by any order. |
perpendicular lines | lines that intersect and form right angles. |
right angle | measures exactly 90 degrees. |
obtuse angle | measures more than 90 degrees. |
skew lines | noncoplanar lines. |
midpoint | a point that divides a segment into two congruent segments. |
acute angle | measures less then 90 degrees. |
parallel planes | do not intersect. |
protactor | measuring device for angles. |