1
CLASSIFYING TRIANGLES BASED ON NUMBER OF EQUAL SIDES
A
B
C
a)
IHG is scalene
b)
IHG is isosceles
c)
IHG is equilateral
JKL is scalene
a)
PQR is scalene
b)
JKL is isosceles
b)
PQR is isosceles
c)
JKL is equilateral
c)
PQR is equilateral
a)
MON is scalene
b)
MON is isosceles
c)
MON is equilateral
a)
EQU is scalene
b)
EQU is isosceles
c)
EQU is equilateral
a)
ACB is scalene
b)
ACB is isosceles
c)
ACB is equilateral
a)
I
G
H
P
J
L
K
Q
R
M
D
F
E
a)
DEF is scalene
b)
DEF is isosceles
c)
DEF is equilateral
N
O
E
S
T
U
a)
SUT is scalene
b)
SUT is isosceles
c)
SUT is equilateral
Q
U
List the characteristics of each type of triangle.
SCALENE
1
ISOSCELES
EQUILATERAL
CLASSIFYING TRIANGLES BASED ON LARGEST ANGLE
a)
A
ACB is acute
I
G
B
J
c)
ACB is obtuse
a)
JKL is acute
H
P
L
c)
JKL is obtuse
D
c)
IHG is obtuse
a)
PQR is acute
b) PQR is right
b) JKL is right
K
IHG is acute
b) IHG is right
b) ACB is right
C
a)
2
Q
R
c)
PQR is obtuse
a)
MON is acute
M
a)
DEF is acute
N
b) DEF is right
c)
F
E
DEF is obtuse
b) MON is right
O
c)
MON is obtuse
a)
EQU is acute
b)
EQU is right
c)
EQU is obtuse
E
S
a)
SUT is acute
Q
b) SUT is right
T
U
c)
SUT is obtuse
U
List the characteristics of each type of triangle.
Acute
Right
Obtuse
2
3
CLASSIFYING TRIANGLES BASED ON
NUMBER OF EQUAL SIDES AND LARGEST ANGLE
A
B
C
J
a)
ACB is acute isosceles
b)
ACB is right isosceles
c)
ACB is obtuse scalene
d)
ACB is acute scalene
a)
JKL is acute scalene
b)
JKL is right scalene
c)
JKL is obtuse scalene
d)
JKL is obtuse right
a)
DEF is acute right
b)
DEF is right isosceles
c)
DEF is acute isosceles
d)
DEF is right scalene
L
K
D
I
G
H
P
Q
R
a)
IHG is acute scalene
b)
IHG is right acute
c)
IHG is obtuse isosceles
d)
IHG is right isosceles
a)
PQR is acute isosceles
b)
PQR is right equilateral
c)
PQR is obtuse equilateral
d)
PQR is acute equilateral
M
F
E
N
O
a)
MON is acute scalene
b)
MON is right scalene
c)
MON is obtuse scalene
d) Not enough information
E
S
T
U
a)
SUT is acute scalene
b)
SUT is right scalene
c)
SUT is obtuse scalene
Q
U
d)
SUT is acute isosceles
a)
EQU is acute isosceles
b)
EQU is right equilateral
c)
EQU is obtuse equilateral
d)
EQU is acute
Is it possible to have the following types of triangles?
a) acute isosceles
d) right isosceles
g) obtuse isosceles
b) acute scalene
e) right scalene
h) obtuse scalene
c) acute equilateral
f) right equilateral
i) obtuse equilateral
3
4
CLASSIFYING TRIANGLES BASED ON
NUMBER OF EQUAL SIDES AND LARGEST ANGLE
D
A
6.7 cm
45°
3.2 cm
108°
C
3.0 cm
90°
56°
E
4.5 cm
33°
27°
B
5.0 cm
F
5.4 cm
K
G
29°
5.0 cm
60°
8.7 cm
5.0 cm
5.0 cm
I
H
5.0 cm
5.0 cm
M
P
M
76°
4.0 cm
O
4.0 cm
N
R
4.2 cm
97°
3.9 cm
39°
44°
52°
52°
L
60°
29°
122°
60°
Q
6.1 cm
5.0 cm
V
S
90°
7.0 cm
7.0 cm
60°
45°
60°
U
60°
X
9.9 cm
T
ABC =
MNO =
DEF =
PQR =
GHI =
STU =
KLM =
45°
W
VWX =
4