For a craft project, two equilateral triangles are taped together to create a quadrilateral. 2 equilateral triangles are connected at one side to create a quadrilateral with congruent side lengths.

What is the quadrilateral?

rhombus
rectangle
trapezoid
square

The quadrilateral formed by the taping together of two equilateral

triangles is a rhombus.

The given types of triangles that form the quadrilateral are equilateral

triangles.

Given that the triangles have congruent side lengths, we have;

1) The side lengths of the quadrilateral formed are equal.

2) A pair opposite angles of the quadrilateral formed are equal to the interior angle of an equilateral triangle which is 60°.

3) The other pair of opposite angles are also equal to 60° + 60° = 120°.

The altitude of an equilateral triangle is perpendicular to the base.

Which gives;

4) The diagonals bisect each other at right angles.

Therefore;

The adjacent angles are supplementary

Which gives;

5) The opposite sides are parallel.

The above properties are the properties of a rhombus

Therefore;

Learn more about rhombus here:

link

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's

to complete this square you have to rotate about the origin 270 degrees clockwise.