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MaRussiya [10]
3 years ago
12

A. 93 B. 57 C. 132 D. 123

Mathematics
2 answers:
Elenna [48]3 years ago
8 0

9514 1404 393

Answer:

  D.  123°

Step-by-step explanation:

The external angle is equal to the sum of the remote internal angles.

  m∠1 = 60° +63°

  m∠1 = 123°

Anika [276]3 years ago
4 0

Answer:

B

Step-by-step explanation:

The interior angles of a triangle always add up to 180 degrees.

We have two angles already and they add up to 60+63=123 degrees

180-123=57

so the remaining angle is 57 degrees

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