Triangles
All these figures are Polygons
Acute
76°
57°
47°
Obtuse
28°
108°
44°
Right
40°
90°
50°
Equiangular
60°
60°
60°
A
B
C
|AB|
|BC|
|AC|
^ABC
^BAC
^ACB
A
B
C
D
Interior Angle
^BAC
Interior Angle
^ABC
Exterior Angle
^BCD
A
B
C
x
y
z
Longer Side
Smaller Angle
Larger Angle
Shorter Side
A
B
C
y = 3
z = 7
x = ?
A
B
C
D
x = ?
80°
(3x-22)°
A
B
C
Leg
Leg
Base
1
2
3
A
B
C
3x - 7
x+15
^CAB° = ?
^ABC° = ?
50°
A
B
C
D
E
F
A
D
B
C
F
E
A
B
C
3x - 7
x+15
^CAB° = ?
^ABC° = ?
50°
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111
222
333
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555
666
777
888
999
000