13. A side of the triangle below has been
extended to for an exterior angle of
161°. Find the value of x. 161° and x° and 46°
D. 19°
E. 46°
F. 134°
E. 46°
Explanation: The exterior angle of a triangle is equal to the sum of the two opposite interior angles.
So, x° + 46° = 161°
x° = 115°
Therefore, the value of x is 115°.