Geometry 1.1-1.2 Flashcard Review

Front

What is a ray in geometry?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What does the notation \( \overrightarrow{xy} \) represent?

Back

It represents a ray that starts at point x and passes through point y.

Front

How do you denote an angle formed by three points A, B, and C?

Back

The angle can be denoted as \( \angle ABC \), where B is the vertex.

Front

What is the difference between a line and a line segment?

Back

A line extends infinitely in both directions, while a line segment has two endpoints.

Front

What is the symbol for a line segment between points A and B?

Back

The symbol is \( \overline{AB} \).

Front

How do you represent a line in geometry?

Back

A line can be represented by two points on the line, such as \( \overleftrightarrow{AB} \).

Front

What is the definition of an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What is a complementary angle?

Back

Complementary angles are two angles whose measures add up to 90 degrees.