Answer:
Step-by-step explanation:
The sum of angles in a triangle is 180 degrees
(a)Given the angles 40° and 50°
The third angle is, therefore:
We, therefore, have the set:
(b)Given the angles 42° and 66°
The third angle is, therefore:
We, therefore, have the set:
(c)Given the angles 60° and 60°
The third angle is, therefore:
We, therefore, have the set: