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Svet_ta [14]
3 years ago
7

I need the value of A

Mathematics
1 answer:
Elza [17]3 years ago
3 0
Since it’s equilateral and all triangles add up to 180 degrees
3(3a-9)=180
3a-9=60
3a=51
a=17
So the value of A is 17 degrees
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