The two corners of the triangle are each 25 degrees. Determine the value of the third angle.

First of all, let us recall that, according to one of the properties of a triangle, the sum of the angles in any triangle is always equal to 180 degrees.

Now let’s calculate what the sum of the two known angles in the desired triangle is equal to. Since both angles are equal to each other and the degree measure of each of them is 25 degrees, their sum will be:

25o + 25o = 50o.

Therefore, in order to calculate the value of the third angle, you need to subtract the sum of the other two angles from 180o, i.e. 50o:

180o – 50o = 130o.

Answer: 130o.