Answer:
<1 = 47
<2 = 137
<3 = 31
Explanation:
90 + 43 + <1 = 180 (all triangles are equal to 180 degrees)
133 + <1 = 180
<2 + 43 = 180
<2 =137
<2 + <3 +12 = 180 (all triangles are equal to 180 degrees)
<3 +137 +12 = 180
<3 +149 = 180
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