Which statement is true about triangular pyramids?
all the lateral faces in a triangular pyramid are congruent.
all triangular pyramids have three lateral faces.
all triangular pyramids have five faces.
all the faces in any triangular pyramid are equilateral triangles.

Triangular pyramids can have as many sides and one base so it is not the 2nd or 3rd answer. And some pyramids have square bottoms so it is not the 4th answer. Therefore the only answer left is the first answer and it is right because all the side pieces except base of a pyramid have the same dimensions

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1