we know that
the sum of an exterior angle and the adjacent interior angle.of a triangle is equal to 180 degrees, because are supplementary angles
therefore
the answer is the option
An exterior angle is supplementary to the adjacent interior angle.
66 multiplied by 2 so your answer is 132
Answer:
86°
Step-by-step explanation:
Given:
A = (6x + 10)°
B = (4x +30)°
Two angles are supplementary if they sum up to 180° ;
A + B = 180°
Now insert the parameters and solve;
6x + 10 + 4x +30 = 180
10x + 40 = 180
10x = 140
x = 14
So;
B = (4x +30)° = 4(14) + 30 = 86°
You can can copy a line segment by making sure the line is straight
