The sizes of angles a, b and c of the diagram not drawn to scale are 50°, 100°, and 30° respectively.
The angles a, b and c are angles in a triangle.
Therefore, the sum of a , b and c should be equals to 180 degrees.
<h3>Angle a</h3>
let's find angle a using the rule as follow:
- sum of angle at a point is 360 degrees
Therefore,
a = 360 - 310 = 50°
<h3>
Angle b</h3>
let's find angle b using the rule as follow:
- Angle on a straight line is equals to 180 degrees.
Therefore,
b = 180 - 80 = 100°
<h3>
Angle c</h3>
let's find angle c using the rule as follow:
- Sum of angle in a triangle is 180 degrees
Therefore,
c = 180 - 50 - 100 = 30°
learn more on angles here: brainly.com/question/22506842?referrer=searchResults
