Respuesta :

The measure of B would be 60 degrees. The reason for this is because each side length on the triangle is equal to each other. This means that the triangle is an equalateral triangle, and since all triangles interior angles equal 180 degrees, 180÷3=60. And there is your answer.

All the sides are equal and all the internal angle B is 60degree.

Given that,

Each side of triangle ABC side length is equal 25cm.

We have to determine,

angle B in triangle ABC.

According to the question,

An equilateral triangle is one in which all three sides are congruent. It also has the property that all three interior angles are equal.

In other words, all three angles of an equilateral triangle are always 60°. Since all sides are congruent.

The other two sides both measure 25 centimeters.

Therefore, In an equilateral triangle, all the sides are equal and all the internal angles are 60degree.

Hence, All the sides are equal and all the internal angle B is 60degree.

For more information about Triangles click the link given below.

https://brainly.com/question/11475265