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7nadin3 [17]
3 years ago
8

120˚

Mathematics
1 answer:
Fudgin [204]3 years ago
4 0
Since this is an equilateral triangle that means all the angles must be congruent
and since all the angles in a triangle add up to 180 degrees each interior angle would be 60 degrees
so.. 60 + y is equal to 180 since the two angles are supplementary
y=120
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