Transcript Slide 1

AN INTRODUCTION
M
E
A
N
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N
G
Geometrical
figures are
said to be
congruent
if they have
same shape
and same size
Figure F1 & Figure F2
are congruent
F1
F2
if F1 when
superposed
over F2
covers it
exactly
Congruency symbol
FIND THE CONGRUENCY IN THESE RECTANGULAR
PLATES
CAN YOU SEE, THE
CONGRUENCY IN THESE
ARCHES
FIND THE SETS OF
CONGRUENT FIGURES HERE
SEE THE
CONGRUENT
FIGURES
SEE THE
CONGRUENT
FACES
CONGRUENT SHAPES
CONGRUENT SHAPES
CHOOSE  SHAPES

SHAPES
congruent figures
Squares are
Circles are
congruent if theircongruent if one
radii equal
of their sides
equal
a
a
Line
segments are
congruent if
their lengths
are equal
An Angle
PENTOGON
congruent figures
Choose the congruent figures
12
13
1
14
8
3
11
5
2
4
16
7
6
9
10
15
Same shape but
not same size



Congruent triangles
Two triangles are congruent
if three angles and three
sides of one triangle are
equal to the corresponding
three angles and three
sides of another triangle
Corresponding Parts
Here  C coincides with  R ,
 A with  P &  B with  Q
We call the pairs Corresponding parts (angles)
Q
C
P
R
Write the other
corresponding
parts (sides)
A
B
Write the corresponding parts
DEF  MLK
ABC  RPQ
K
P
R
M
A
D
Q
B
C
E
L
F
Assignment
State true or false
1.When a line segment is bisected we
get two congruent line segments
2.When an angle is bisected we obtain
two angles which are congruent to
each other
3.Circles always have same shape and
same size
CONDITIONS FOR
CONGRUENCE
SSS
SAS
ASA also
RHS
AAS
SSS
SAS
LET US
LEARN
ABOUT
THIS IN
LESSON-2
ASA
RHS