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Can someone help me with this, pleasee.

Can Someone Help Me With This Pleasee class=

Sagot :

Answer:

120°

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Subtract the sum of the given angles from 180 for third angle

third angle = 180° - (20 + 40)° = 180° - 60° = 120°