Question

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

Answer 1

Answer:

$\boxed{x=60}$

Step-by-step 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.

$130-70=70+x-70$

$60=x$

Answer 2

Answer:

x = 60°

Step-by-step 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°