⊿𝔹𝕆𝔽 ⋂ ⊿𝔻𝕆𝔽

The intersection of two sets, denoted by ∩, is the set of elements that are common to both sets.

In the case of Δ𝐵𝑂𝐹 ∩ Δ𝐷𝑂𝐹, we need to know the elements of the sets Δ𝐵𝑂𝐹 and Δ𝐷𝑂𝐹 in order to find their intersection.

Please provide the elements of both sets so that I can help you find their intersection.