In a triangle, one angle is 30 degrees and the other is 40 degrees. Find the third corner.

In a triangle:

One angle = 30 °;
Second angle = 40 °.
Find the third corner.

If 2 angles are known in a triangle, then we can find the third angle.

In order to find the third angle, you need to subtract 2 known angles from 180 °. That is, we get:

180 ° – (30 ° + 40 °) = 180 ° – 70 ° = 100 ° + 80 ° – 70 ° = 100 ° + 10 ° = 110 °;

This means that the third angle is 110 °.

Answer: 110 °.