In a triangle, one of the angles is 43 and the other angle is 98, find the third corner of the triangle.

It is known from the condition that one of the angles of the triangle is 43 °, and the degree measure of the second angle is 98 °. We need to find what the third corner of the triangle is equal to.

Let’s start by recalling the triangle sum theorem. It says that the sum of the angles of a triangle is 180 °.

In order to find the degree measure of the third angle, we must subtract the sum of the two known angles of the triangle from 180 °.

So, we are looking for the degree measure of the third angle of the triangle:

180 ° – (43 ° + 98 °) = 180 ° – 141 ° = 39 ° third corner of the triangle.