This is covers the sum of the interior angles of a triangle, the exterior angle theorem and the properties of triangles.
Right Obtuse
Isosceles Obtuse
Scalene Obtuse
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90
100
126
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16.6
19.3
22
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The length of each side is 20.
The length of each side is 40.
The length of each side is 60.
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38
77
103
180
360
Not enough information
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80
50
40
90
180
360
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5x = 120 + x
120 + x + 5x = 180
120 + x = 5x + 180
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60
75
105
6.75
15
27
40
45
50
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