2 answers:
All triangles equal 180
so for the first one you add all the angles
76 + 46 + x = 180
122 + x = 180
- 122 -122
x = 58 degrees
For the second one you do the same
38 + 43 + k = 180
81 + k = 180
-81 81
k = 99 degrees
The last one
26 + 17 + w = 180
43 + w = 180
-43 -43
w = 137 degrees
Do you know what complementary and supplementary angles are
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