Question

If an equilateral triangle in cut along any one of its lines of symmetry, then the number of right angles so formed is

• A. $0$
• B. $1$
• C. $2$
• D. None of the above

Answer 1

The correct option is C $2$

Number of lines of symmetry in an Equilateral Triangle $=3$ and they are all $3$ medians of the triangle.

In an equilateral triangle, median is same as altitude :

$\Rightarrow$ Every line of symmetry cuts the base at ${90}^{\circ }$ angle.

$\Rightarrow$ Two right angles are formed by every line of symmetry.