In a triangle, one angle is 80 °, the second angle is 30% less than it, find the unknown angles of the triangle.

The solution of the problem:
The angles of a triangle add up to one hundred and eighty degrees.
1. Find out how many degrees the second angle is less than the first angle.
80/100 * 30 = 24 degrees.
2. What is the second angle of the triangle?
80 – 24 = 56 degrees.
3. Determine what is the third angle of the triangle.
180 – (80 + 56) = 180 – 136 = 44 degrees.
Answer: The second angle of the triangle is fifty-six degrees, the third angle of the triangle is forty-four degrees.