6
1
Five.
5 of them.
4 triangular lateral faces
Yes, a square has four vertices. A vertex is a point in which two or more lines intersect.
a square based pyrmaid has 24 lines of symitry
im guessing you mean pyramid, If its a standard square based pyrmaid then it will have 5 sides.
3, one for each corner. *many *triangle have.
4
a prymaid has 4 sides
Only the four corners of the square base will have a right angle, one in each corner.
5 flat surfaces.