Question

In an isosceles triangle, the vertex angle is twice either base angle. (Let the base angle be b in degrees. Remember that the sum of angles of a triangle is 180 degrees). Set up an equation.

Answer 1

Answer:

Let base angle = b

so vertex angle = 2b

sum of angles = 180 degrees

so,

2b + b + b= 180 degrees

4b = 180 degrees

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