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Find the measure of the vertex angle in the diagram

1 Answer

4 votes

As according to given diagram:

The given triangle is isosceles triangle.

So as we know that the angle infront of equal sides are also equal.

hence:


\begin{gathered} 2x+2(2x-3)=180 \\ 2x+4x-6=180 \\ 6x=186 \\ x=(186)/(6) \\ x=31 \end{gathered}

Now the vertex angle is 2x so:

2(31)=62 degree

hence B is correct option

User Rfanatic
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