Geometry Big Ideas chapter 1

Front

What are vertical angles?

Back

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

Front

What is the definition of adjacent angles?

Back

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

Front

What is a linear pair of angles?

Back

A linear pair of angles consists of two adjacent angles whose non-common sides form a straight line. They are supplementary.

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 the relationship between points and lines in geometry?

Back

A line is defined by at least two points. If two points are not on the same line, they are called non-collinear.

Front

What is the intersection of two planes?

Back

The intersection of two planes is a line.

Front

How do you express the segment addition postulate?

Back

If point B is between points A and C, then AB + BC = AC.

Front

What is the definition of collinear points?

Back

Collinear points are points that lie on the same straight line.

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.