As you can see from the image in the picture all the sides of the triangle are equal to each other (25). This means that this is an equilateral triangle.
The definition of an equilateral triangle is:
A triangle that has all sides equal to each other. The angles are also equal to each other. Since it is known that the sum of all the angles of a triangle equals 180, one angle of an equilateral triangle is always 60 degrees ( 180 / 3 = 60).
That means angle B has the measure of 60 degrees
Hope this helped!
~Just a girl in love with Shawn Mendes
