To solve such questions we need to know about equilateral triangles and rhombus.
Equilateral triangle
An equilateral triangle is a triangle whose all the sides are of equal length and always have all the angles measure equal to 60°.
Rhombus
A rhombus is a quadrilateral, whose length of all the sides is equal and the pair opposite sides are always parallel.
Given to us
If an equilateral triangle is reflected along with one of its edges
Solution
When an equilateral triangle is reflected along with one of its sides, then the shape that will be formed is a rhombus. As we can see in the image below when the triangle having sides of length a is reflected, the side along which it is reflected, that side will form the diagonal of the rhombus. while the other side forms the two sides of the rhombus, having the same length as 'a', also, as the other two sides are the reflection of the other sides they will also have the same length.
therefore, the shape that will be formed will be a rhombus.
Learn more about Equilateral triangles:
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