Question

A/an is formed by cutting an isosceles triangle along a line parallel to the side of the triangle connecting the equal angles of the triangle.

Answer 1

An isosceles trapezoid is formed by cutting an isosceles triangle along a line parallel to the side of the triangle connecting the equal angles of the triangle.



Here, ABC is an isosceles triangle with $AB=AC.$
BC is the line connecting the equal measure angles $\angle B$ and $\angle C.$

By cutting the triangle along ED, which is parallel to BC, an isosceles trapezoid is obtained.