G 70 Exterior Angle1
User Manual: G-70
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Page Count: 2
Printable Math Worksheets @ www.mathworksheets4kids.com
1)
∠EFX =
2)
∠TVX =
3)
∠BDX =
4)
∠EFX =
5)
∠PQX =
6)
∠VWX =
7)
∠KJX =
8)
∠ABX =
9)
∠QRX =
Find the unknown exterior angle for each triangle.
T
U
V
50
50
X
E
F GX
70
40
D
E
F
40
30
X
P
QR
45
X
45 W
UV
45
55
X
J
K
L
65
40
X
P Q
R
35 35
X
B
CD
40
40
X
A
B C
35
X
Triangle-Exterior Angle
The measure of an exterior angle of a triangle is equal to sum of the measures of opposite interior angles.
∠A and ∠B
Exterior angle : ∠ACX
Opposite interior angles :
∠ACX = ∠A + ∠B
100 + 35
= 1350∠ACX
Exterior angle = Sum of opposite interior angles
∠ACX =
A
BC X
100
35
Sheet 1
Printable Math Worksheets @ www.mathworksheets4kids.com
1)
110
∠EFX =
2)
100
∠TVX =
3)
80
∠BDX =
4)
70
∠EFX =
5)
90
∠PQX =
6)
100
∠VWX =
7)
105
∠KJX =
8)
125
∠ABX =
9)
70
∠QRX =
Find the unknown exterior angle for each triangle.
T
U
V
50
50
X
E
F GX
70
40
D
E
F
40
30
X
P
QR
45
X
45 W
UV
45
55
X
J
K
L
65
40
X
P Q
R
35 35
X
A
B C
35
X
B
CD
40
40
X
Triangle-Exterior Angle
The measure of an exterior angle of a triangle is equal to sum of the measures of opposite interior angles.
∠A and ∠B
Exterior angle : ∠ACX
Opposite interior angles :
∠ACX = ∠A + ∠B
100 + 35
= 135∠ACX
Exterior angle = Sum of opposite interior angles
∠ACX =
A
BC X
100
35
Sheet 1
Answer key
