1.1 Segment/Angle Flashcard 1

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 segment in geometry?

Back

A segment is a part of a line that is bounded by two distinct endpoints.

Front

Define an angle in geometry.

Back

An angle is formed by two rays (sides of the angle) that share a common endpoint (the vertex).

Front

What is the difference between acute, obtuse, and right angles?

Back

An acute angle is less than 90 degrees, a right angle is exactly 90 degrees, and an obtuse angle is greater than 90 degrees but less than 180 degrees.

Front

What does it mean for angles to be complementary?

Back

Two angles are complementary if the sum of their measures is 90 degrees.

Front

What does it mean for angles to be supplementary?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is the relationship between adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is the segment addition postulate?

Back

The segment addition postulate states that if point B is between points A and C, then AB + BC = AC.

Front

What is the definition of a vertical angle?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.