Unit 1 Formative 1

Subtraction Property

2x + 4 = 16, becomes 2x = 12

Plane

A flat surface that extends in all directions without end and has no thickness.

two points

A line can be named with a lower case script letter or with _______________ ________________.

Three points

A plane can be named by an italicized capital letter or by ____________ __________.

Midpoint

A point that divides a line segment into 2 equal portions.

Segment

A portion of a line that consists of two endpoints and all points between them.

Ray

A portion of a line that has an endpoint and continues in one direction.

Segment addition postulate

If 3 points are collinear and B is in between point A and C, then AB + BC = AC

Substitution property

If A = 5, then A + B = 5 + B

Line

It represented by a straight path that extends in two opposite directions without end and has no thickness.

Segment AB + Segment BC = Segment AC

Segment addition postulate

Intersection

The _______________________ of two planes forms a line.

Point

The intersection of two lines.

Coplanar

The term for points or lines that lie on the same plane.

Collinear points

They lie on the same line.

Congruent

Used to describe measurements that are the same. For example, two line segments with the same length.