Geometry Unit 1 Lesson 2

How many points are on this plane?

6

Which three points are collinear?

A,B,C

Which points are coplanar?

A,B,C,D,E,F

Name the line.

AC, AB, BA, BC, CA, CB

Select SIX possible line segments.

BA, CA, AC, AB, CB, BC

Select SIX possible rays.

BA, CB, CA, BC, AC, AB

Which three points are noncollinear?

D,E,F

A property of space consisting of the measure of distance in one direction is called ___.

Dimension

The point at either end of a line segment or the point at the start of a ray is the ___.

Endpoint

Look at the simplified map and the photo. Choose the number of the postulate that will answer the question. Consider Texas to be a plane.

Postulate 1.2A: Through any two points there is exactly one line.

A plane is a flat surface that has no ___ and extends forever.

Thickness

Terms that describe basic geometric figures that are fundamental to all other geometric figures and, as such, cannot be defined by using other geometric terms are called ___.

Undefined terms

A(n) ___ is a statement accepted as true without proof as a basis for reasoning.

Postulate

A straight path that has no thickness and extends forever is a ___.

Line

If two planes intersect, they intersect in exactly one _____. (Postulate 1.2E)

Line

Points that lie on the same ___ are collinear points.

Line

Through any two points there is exactly one ______. (Postulate 1.2A)

Line

A portion of a line consisting of two points and all the points between them is called a(n) ___.

Line Segment

If any two points lie on a plane, then the ____ that contains those two points also lies on the ____. (Postulate 1.2C)

Line, plane

Through any three ____ ____ there is exactly one plane. (Postulate 1.2B)

Noncollinear, points

Points that lie on the same ___ are coplanar points.

Plane

Select THREE possible names for the plane.

Plane ABD, Plane R, Plane BCE

A location in space, called a ___, has no size or dimension.

Point

If two lines intersect, they intersect at exactly one ____. (Postulate 1.2D)

Point

Look at the simplified map and the photo. Choose the number of the postulate that will answer the question. Consider Texas to be a plane.

Postulate 1.2B: Through any three noncollinear points there is exactly one plane.

Look at the simplified map and the photo. Choose the number of the postulate that will answer the question. Consider Texas to be a plane.

Postulate 1.2C: If two points lie on a plane, then the line that contains those two points also lies on the plane.

Look at the simplified map and the photo. Choose the number of the postulate that will answer the question. Consider Texas to be a plane.

Postulate 1.2D: If two lines intersect, they intersect at exactly one point.

Look at the simplified map and the photo. Choose the number of the postulate that will answer the question. Consider Texas to be a plane.

Postulate 1.2E: If two planes intersect, they intersect in exactly one line.

A(n) ___ is a portion of a line that starts at one point and extends forever in only one direction.

Ray

___ is the unlimited region in which all things exist.

Space