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the angles of a triangle have measures of 78 degrees, 73 degrees, and 29 degrees. Which of the following be the measure of an exterior angle of a triangle?

A = 151 degrees.
B=141 degrees.
C=117 degrees.
D=112 degrees

Sagot :

sqvatorex

Answer:

It's A.

Step-by-step explanation:

Extorior angles are 2 angles which match together which means 1 angle from outside the triangle matches with another angle in the triangle and form 180 degrees.

Use 180 and minus 78, 73 and 29 degrees separately. Do it until one of your answers match one of the options.

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