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Use exterior angle of triangle theorem to find the missing measure of an angle in a polygon. ​

Use exterior angle of triangle theorem to find the missing measure of an angle in-example-1
User Melvynx
by
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2 Answers

3 votes

Answer:


\boxed{x=60}

Explanation:

The exterior angle theorem states that the exterior angle of a triangle is equal to the sum of the two opposite interior angles of the triangle.


130=70+x

Subtract 70 from both sides.


130-70=70+x-70


60=x

User Axbeit
by
8.2k points
1 vote

Answer:

x = 60°

Explanation:

Exterior angle is equal to the sum of opposite interior angles

x + 70 = 130

Subtract 70 from both sides

x = 130 - 70

x = 60°

User Augusto Barreto
by
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