Question

A triangle is constructed as shown in the figure below.

Which of the following statement is/are incorrect about $\Delta$ DEF?

• A. All its sides are equal
• B. It is an isosceles triangle
• C. It is a scalene triangle
• D. It is not an equilateral triangle

Answer 1

The correct option is A All its sides are equal

From the given figure, the markings on the triangle's sides suggest that they have different lengths.
Hence, it's a scalene triangle, not an equilateral triangle and has an acute angle.
Therefore, Option A is the incorrect statement out of the following given choices.