6th Grade Math Textbook, Progress

17

Geometry I

Geometric Figures

Plane XYZcontains

the points X, Y, and Z.

Gand Hare points.

G
H
is a line segment.

GHis a line.



G

H

X.

Y.

Z.

E C

E

B

C

Angle CEB(
CEB) is

formed by ECand EB.



B

T

M

C

D

P

X

E

Q

Some simple geometric figures:

point — an exact location in space,

usually represented by a dot

line — a set of points in a plane that

forms a straight path and extends

indefinitely in opposite directions

line segment — part of a line with

two endpoints

plane — a flat surface that extends

indefinitely in all directions

ray — part of a line that starts at an

endpoint and extends

indefinitely in one direction.

angle — formed by two rays with a common

endpoint. The common endpoint is

called the vertex of the angle. The

letter naming the vertex is always

in the middle.

Identify each figure. Then name it using symbols.

1. • A 2. 3. 4. 5.

Ray EC(EC) has

endpoint E.



Think

Point Eis the vertex of 
E.

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