Answer:
it's 57
Explanation:
the 3 angles add up to 180 so add the 2 angles together to get 123 and then subtract that from 180
57°
A triangle's angles should all add up to 180°
So you have to add up the other two given angles, so in this case it is 60° + 63°, which equals 123°. Then you subtract 123 ° from 180°, giving you the answer of 57°.
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