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Arte-miy333 [17]
1 year ago
8

Angle Sum Theorem. y = ?

Mathematics
1 answer:
salantis [7]1 year ago
8 0

Answer:

90°

Step-by-step explanation:

Interior angles of ALL triangles sum to 180°

The whole large triangle has angles 60 60 60   ( they sum to 180)

that means x = 30

then the small triangle on the right has     60 + 30 + y = 180

  meaning y = 90 °

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