Geometry Accelerated: Ch 1 Review

Front

What is a plane in geometry?

Back

A flat, two-dimensional surface that extends infinitely in all directions.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always equal.

Front

How many moons does Earth have?

Back

1

Front

What does coplanar mean?

Back

Points that lie on the same plane.

Front

How do you find the endpoint of a line segment given one endpoint and the midpoint?

Back

Use the midpoint formula: If M is the midpoint and A is one endpoint, then B = (2M - A).

Front

What is the midpoint formula?

Back

The midpoint M of a line segment with endpoints A(x1, y1) and B(x2, y2) is M = ((x1 + x2)/2, (y1 + y2)/2).

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

Define collinear points.

Back

Points that lie on the same straight line.

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 are complementary angles?

Back

Two angles that add up to 90 degrees.