GEOMETRY

1
GEOMETRY
2
POINT

• Has no size, only location

A
3
LINE

• Continues without end in opposite directions.
  You can name a line by using two points on the
  line.

A
B
AB
4
PLANE

• A flat surface that extends in definitely in four
  directions.

5
SEGMENT

• Part of a line. It is made up of two points and
  all the points of the line that joins the two
  points.

G
F
FG
6
RAY

• Part of a line. It consists of one endpoint and
  all the points of the line on one side of the
  endpoint.

N
P
NP
7
COLLINEAR

• If a line can be drawn through a set of points,
  the points are collinear.

P
L
D
Points D, L, and P are collinear.
8
NONCOLLINEAR

• If no one line can be drawn through all the
  points, the points are noncollinear.

T
S
U
9
PARALLEL LINES

• Lines in the same plane that do not intersect.

10
VERTICAL LINES

11
HORIZONTAL LINES

12
DEGREE

• 360 equal parts

13
SKEW LINES

• Lines that lie in different planes. They are
  neither parallel nor intersecting.

14
ANGLE

• is made up of two rays with a common endpoint
  called the vertex.

O
VERTEX
M
P
ltOMP or ltPMO
15
ACUTE ANGLE

• Measures less than 90

N
J
P
ltNJP or ltPJN
16
RIGHT ANGLE

• Measures exactly 90

W
X
Z
ltWXZ or ltZWX
17
OBTUSE ANGLE

• Measures greater than 90 and less than 180

U
K
T
ltUTK or ltKTU
18
STRAIGHT ANGLE

• Measures exactly 180

C
R
B
ltCBR or lt RBC
19
PERPENDICULAR

• Lines that intersect to form right angles.

20
COMPLEMENTARY ANGLES

• Two angles, the sum of whose measures is 90.

R
S
ltRTS and ltSTU are complementary angles
T
U
21
SUPPLEMENTARY ANGLES

• Two angles, the sum of whose measures is 180

I
G
D
F
ltDGI and ltIGF are supplementary angles
22
TRANSVERSAL LINES

• Intersect a pair of parallel lines.

lts 1 2 and lts 7 8 are outside the parallel
lines. They are exterior angles.
1
2
7
8
23
lts 3,4,5, and 6 are inside the parallel lines.
They are called interior angles.
3
4
5
6
24
CONGRUENT ANGLES

• Angles that have the same measure.

25
CONGRUENT SEGMENTS

• Segments that have the same length.

26
ACUTE TRIANGLE

• A triangle with three acute angles.

27
OBTUSE TRIANGLE

• A triangle with one obtuse angle.

28
RIGHT TRIANGLE

• A triangle that has one right angle.

29
EQUILATERAL TRIANGLE

• A triangle with three congruent sides and three
  congruent angles.

30
ISOSCELES TRIANGLE

• A triangle that has at least two congruent sides.

31
SCALENE TRIANGLE

• A triangle with no congruent sides.

32
POLYGON

• A closed shape formed by line segments that do
  not cross.

33
CONVEX POLYGON
A rubber band can fit tightly around this figure.

34
PARALLELOGRAM

• A quadrilateral with both pairs of opposite sides
  parallel.

35
RECTANGLE

• A parallelogram with four right angles.

36
RHOMBUS

• A parallelogram with four congruent sides.

37
SQUARE

• A rectangle with four congruent sides.

38
TRAPEZOID

• A quadrilateral with exactly one pair of parallel
  sides.