Find the third angle of a triangle if its two angles are 1) 31 and 24 degrees 2) 17 and 131 degrees 3) 1 and 7 degrees

We will solve the existing example in stages.

Knowing that the sum of the three angles of a triangle is always 180 °, we first find the third angle of the triangle with angles 1) 31 ° and 24 °.

As a result, we get the third angle equal to 180 – 31 – 24 = 180 – 55 = 125 °.

Then, we find the third angle of the triangle with the degree measures of the two angles 2) 17 ° and 131 °.

The total will be 180 – 17 – 131 = 180 – 148 = 32 °.

The third angle for a triangle with two angles 3) 1 ° and 7 ° will be 180 – 1 – 7 = 180 – 8 = 172 °.