Math

1. Chapter 3 GEOMETRY
lesson 1
Simple geometric
figures
Presented by:
Aljean l. Bautista
Riza jane Gilgon
Beed2-A

2. Objectives
•Demonstrate understanding of
Geometry
•Identify different simple geometric
figures
•Explain differences in each geometric
figures

3. Geometry
Branch of mathematics that
deals with the
measurement, properties,
and relationships of points,
lines, angles, surfaces, and
solids.

4. POINT
- Is a location in
space
-Simply represented
by a dot.
•
•
A
B
C D
E
F
G
H
point A
point B
point C
point D
•A
•B
•C
•D

5. •
•
A
B
C D
E
F
G
H
LINE
-Is a continuous
connection of points
-It has no endpoints
Straight line
EA
AE
Line AB or BA
Line AE or EA
AB BA

6. curved line -
boundary of more
complicated geometric
shapes.
•
A
B

7. •
•
A
B
C D
E
F
G
H
LINE SEGMENT
-A part of a line
-Has a finite set of
points on a straigh
path
Line segment
BE or EB
Line segment
BC or CB
BE
BC

8. broken line - is a group of
segments connected accordingly with
points of neighboring segments not on
one line.
• vertices- all
points in a
broken line.
A, B, C, D, F, G

9. Closed broken line - If
the starting point of the
first segment coincides
with the ending point of the
last segment.

10. Plane
a plane is a two-dimensional
surface and has length and
width, but no height, and
extends infinitely far on all sides.

11. •
•
A
B
C D
E
F
G
H
RAY
-A part of a line
-Has 1 endpoint &
can be extended in
1 direction only.
Ray CG
CG

12. Midpoint
A midpoint of the segment
is the point that divides
the segments into two
congruent segments.
midpoint L from the
line segment.
Since L is the
midpoint, we know
that the lengths
AL = LP
• •
•
A L P

13. Parallel lines
-lines that do not meet no matter
how long you extend.
• •
•
•
A B
C D

14. Perpindicular lines
-lines that forms a right angle.
A
B
C
90°
AC CA are perpendecular
Right angle BAC or CAB

15. Intersecting lines
- two or more lines that cross each
other in a plane.
R
X
S
E
D
R - is the
intersecti
ng point

16. •
•
A
B
C D
E
F
G
H
ANGLE
-Two rays that
meet at the
common
endpoint
Angle BAE or EAB
BAE or EAB

17. KINDS OF ANGLE
1. Right Angle - an angle
measures at exactly 90°
90°

18. 2. Acute Angle - an
angle measures less
than 90°
60°

19. 2. Obtuse Angle - an
angle measures more
than 90°but less than
180°
145°

20. When two or more lines cross
each other in a plane, they are
called intersecting lines.