Question

isosceles triangle, a base angle is four times its vertical angle. Find all the
6. In an isosceles triar
angles of the triangle.​

Answer 1

Step-by-step explanation:

Let the vertex angle be x,

base angle 4(x) = 4x

$\implies$ $4x+4x+x=180°$ (Angle sum property)

$\implies$ $9x=180°$

$\implies$ $x=\Large\frac{180}{9}$

$\implies$ $\boxed{x=20°}$

$\implies$ $4x=4(20)=80°$

The angles are 80°, 80°, 20°

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