Answer: The answer is a parallelogram.
Step-by-step explanation: Given that two equilateral triangles are taped together to create a quadrilateral in a craft project. We are to decide the type of quadrilateral formed.
As shown in the attached figure, two equilateral triangles 1 and 2 are taped together to form the quadrilateral ABCD.
In quadrilateral ABCD, we have
AB = CD = BC = DA.
Also, ∠ABC = ∠ADC = 60° and ∠BAD = ∠BCD = 60° + 60° = 120°.
Hence, ∠ABC + ∠BAD = ∠ADC+ ∠BCD = 180°, which implies that AB ║CD and BC ║ AD.
Therefore, the quadrilateral ABCD will be a parallelogram.
Thus, the answer is a parallelogram.