Answer:
a.) 130°
b.) 70°
Step-by-step explanation:
For a given triangle
<h2>a.)</h2>
The sum of all angles on a straight line is equal to 180°
Now,
50° + a = 180°
Subtract 50° from each side we get,
50° - 50° + a = 180° - 50°
a = 130°
Thus, The size of the angle marked a is 130°
<h2>
b.)</h2>
The sum of all angles in a triangle is equal to 180°
Now,
b + 50° + 60° = 180°
b + 110° = 180°
Subtract 110° from both side we get,
b + 110° - 110° = 180° - 110°
b = 70°
Thus, The size of the angle marked b is 70°
<u>-TheUnknownScientist</u><u> 72</u>
