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Angle Sum Theorem. y = ?
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Angle Sum Theorem. y = ?

Angle Sum Theorem. y = ?-example-1
User IbrarMumtaz
by
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1 Answer

5 votes

Answer:

90°

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 °

User Frank Puffer
by
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