Unit 2 - Building Blocks of Geometry Flashcards
What is a point in geometry?
A point is a precise location or position in space, represented by a dot.
True or False: A point has length, width, and depth.
False
What is a line?
A line is a straight one-dimensional figure that extends infinitely in both directions.
How is a line named?
A line is named using two points on the line or a lowercase letter.
What is the difference between a line and a line segment?
A line segment has two endpoints, while a line extends infinitely.
Fill in the blank: A line segment is part of a line that has _______.
two endpoints
What is a ray?
A ray is a part of a line that has one endpoint and extends infinitely in one direction.
How do you name a ray?
A ray is named by its endpoint and another point on the ray.
What is the midpoint of a line segment?
The midpoint is the point that divides the segment into two equal parts.
True or False: The midpoint can be found by averaging the coordinates of the endpoints.
True
What is an angle?
An angle is formed by two rays that share a common endpoint called the vertex.
How do you classify angles based on their measures?
Angles can be classified as acute, right, obtuse, straight, or reflex.
What is an acute angle?
An acute angle measures less than 90 degrees.
What is a right angle?
A right angle measures exactly 90 degrees.
What is an obtuse angle?
An obtuse angle measures more than 90 degrees but less than 180 degrees.
Fill in the blank: A straight angle measures ______ degrees.
180
What is a reflex angle?
A reflex angle measures more than 180 degrees but less than 360 degrees.
True or False: Two angles are complementary if the sum of their measures is 90 degrees.
True
True or False: Two angles are supplementary if the sum of their measures is 180 degrees.
True
What is the vertex of an angle?
The vertex is the common endpoint where the two rays meet.
What is a straight line segment?
A straight line segment is the shortest distance between two points.
Fill in the blank: The distance formula is used to find the length of a _______.
line segment
What are opposite rays?
Opposite rays are two rays that share an endpoint and extend in opposite directions.
How can angles be named?
Angles can be named using three points, with the vertex in the middle, or by using a single letter.
