Question

vocabulary: use your vocabulary note - cards to help you fill in the blanks in the sentences below.

1. a ____________ is an undefined term in geometry usually visualized as a dot representing a non - dimensional location in space.
2. a ____________ is a two - dimensional flat surface that extends indefinitely in all directions.
3. ____________ angles have a common side and a common vertex.
4. a ____________ is part of a line that contains two end points and all the points between them.

for each of the following, match the vocabulary word to its appropriate definition.

1. line
2. vertical angles
3. midpoint
4. supplementary angles
5. alternate interior angles
6. collinear points
7. straight angle

an angle that measures exactly 180 degrees.
divides a segment into two congruent segments.
two angles whose measures have a sum of 180°.
a set of points that extends indefinitely in opposite directions. has no thickness or width.
a pair of angles that, when the lines are parallel, are congruent.
the non - adjacent angles formed by 2 intersecting lines.
points that lie on the same line.
note: you are expected to study all vocabulary terms in unit 1 to prepare for your test. the terms listed in #2 - 11 are only some of the terms we have discussed in class.

Explanation:

1. In geometry, a point is an undefined term represented as a dot for a non - dimensional location.
2. A plane is a two - dimensional flat surface extending infinitely.
3. Adjacent angles share a common side and a common vertex.
4. A line segment has two endpoints and all points between them.

For the matching part:

• A line extends infinitely in opposite directions with no thickness or width.
• Vertical angles are non - adjacent angles formed by 2 intersecting lines.
• A mid - point divides a segment into two congruent segments.
• Supplementary angles have measures that sum to 180°.
• Alternate interior angles are congruent when lines are parallel.
• Collinear points lie on the same line.
• A straight angle measures exactly 180°.

Answer:

1. Point
2. Plane
3. Adjacent
4. Line segment
5. A set of points that extends indefinitely in opposite directions. Has no thickness or width.
6. The non - adjacent angles formed by 2 intersecting lines.
7. Divides a segment into two congruent segments.
8. Two angles whose measures have a sum of 180°.
9. A pair of angles that, when the lines are parallel, are congruent.
10. Points that lie on the same line.
11. An angle that measures exactly 180 degrees.